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Recent questions tagged combinatory
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1
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BS Gerewal engineering mathematics
hey guys, what is meant by the statement “cards are drawn in succession” . does it means whether one by one the cards were drawn OR all the cards were drawn at once any help is really appreciated….
asked
1 day
ago
in
Probability
by
rish1602
(
9
points)

6
views
discretemaths
combinatory
counting
0
votes
0
answers
online search
there are 5 pairs of different shoes.in how many ways can each person so that at least two person get a complete pair
asked
Oct 20
in
Combinatory
by
ajay05908
(
5
points)

10
views
combinatory
0
votes
1
answer
Rosen  combinatorics ex 5.5 que 4
Every day a student randomly chooses a sandwich for lunch from a pile of wrapped sandwiches. If there are six kinds of sandwiches how many diff ways are there for the student to choose sandwiches for the 7 days of a week if the order in which sandwiches are chosen matters
asked
Oct 1
in
Combinatory
by
simi2426
(
5
points)

24
views
combinatory
0
votes
1
answer
Test Question of Applied Gate
Not able to solve this question. How to solve this type of questions?
asked
Sep 16
in
Combinatory
by
AbhayPrajapati
(
7
points)

28
views
combinatory
0
votes
0
answers
UGC NET 2016 as well as Discrete Maths Kenneth Rosen PAGE Pg 657 Q21
asked
Sep 15
in
Set Theory & Algebra
by
Shashank Rustagi
(
513
points)

22
views
kennethrosen
combinatory
0
votes
2
answers
KENNETH ROSEN DISCRETE MATHEMATICS PAGE 432 Q11
How many ways are there to chose eight coins from piggy bank containing 100 identical pennies and 80 identical nickels.
asked
Sep 14
in
Combinatory
by
Shashank Rustagi
(
513
points)

50
views
kennethrosen
combinatory
counting
discretemaths
0
votes
0
answers
Self Doubt on Combinatorics
Why these 2 questions solved in different manner while it seems like both are same type questions?? Anyone Please.
asked
Sep 4
in
Combinatory
by
AbhayPrajapati
(
7
points)

22
views
combinatory
selfdoubt
maths
combinatory
0
votes
1
answer
Self Doubt on Combinatorics
Is there any difference between these 2 questions?? If yes then how can we solve this???
asked
Sep 3
in
Combinatory
by
AbhayPrajapati
(
7
points)

49
views
maths
selfdoubt
combinatory
+1
vote
1
answer
K Rosen(7th ed). Chapter 6. Exercise 6.4. Q.17.
Question: Answer 1: Answer 2: I am not able to understand the solution.What’s happening here? Please help.
asked
Aug 13
in
Combinatory
by
RasMalai
(
27
points)

27
views
kennethrosen
combinatory
counting
discretemaths
0
votes
3
answers
Self Doubt. Combination, Circular. A, B, C, D, E, f are on circlular table.
asked
Aug 12
in
Combinatory
by
mamtuj
(
25
points)

48
views
combinatory
selfdoubt
0
votes
1
answer
Combinatorics and Probability
Six people, including A,B, and C, form a queue in a random order (all 6! orderings are equiprobable). Consider the event "B is between A and C in the queue". What is its probability? (The order of A and C can be arbitrary, but B should be between them).
asked
Aug 5
in
Probability
by
aryashah2k
(
2
points)

19
views
permutation&combination
conditionalprobability
discretemaths
probability
combinatory
0
votes
0
answers
Self doubt on combinatorics
How many strings are there, using 10 A's, 12 B's, 11 C's, and 15 D's, such that no A is followed by a B, and no C is followed by a D?
asked
Jul 29
in
Combinatory
by
RasMalai
(
27
points)

13
views
combinatory
permutation&combination
combinatory
+1
vote
1
answer
Kenneth Rosen(7th ed). Chapter 6. Example 16.
Each user on a computer system has a password, which is six to eight characters long, where each character is an uppercase letter or a digit. Each password must contain at least one digit. How many possible passwords are there? Answer is given in book as : P^6 + P ... on for P^7 and P8. My question is why can't we calculate P^6 like 36^5 * C(6,1) * 10 ?
asked
Jul 29
in
Combinatory
by
RasMalai
(
27
points)

20
views
combinatory
counting
kennethrosen
0
votes
0
answers
Sheldon Ross (8th ed). Chapter 1. Self test problems. Q 4.
asked
Jul 29
in
Combinatory
by
RasMalai
(
27
points)

24
views
combinatory
0
votes
0
answers
Sheldon Ross(8th ed). Chapter 1. Theoretical Excercises. Q 11.
asked
Jul 27
in
Combinatory
by
RasMalai
(
27
points)

29
views
combinatory
0
votes
1
answer
Combinatorics Simple doubt
What is the difference between flipping a pair of Distinct dices and flipping a pair of Identical Dices ??
asked
Jun 18
in
Mathematical Logic
by
BHASHKAR
(
73
points)

20
views
discretemaths
permutation&combination
discretemaths
combinatory
0
votes
1
answer
#self doubt why is the method wrong to solve the problem
asked
Jun 12
in
Probability
by
abhijeet at
(
7
points)

17
views
combinatory
cards
probability
0
votes
1
answer
self doubt permutation and combination
asked
May 31
in
Combinatory
by
Abhipsa
(
5
points)

18
views
discretemaths
combinatory
0
votes
1
answer
Self Doubt recurrence equation
asked
May 31
in
Combinatory
by
Abhipsa
(
5
points)

25
views
discretemaths
combinatory
0
votes
1
answer
P&C  self doubt
Find the number of arrangements of the letters of the word "INDEPENDENCE" if they start with "P" and end with "D"
asked
May 27
in
Combinatory
by
Abhipsa
(
5
points)

23
views
discretemathematics
combinatory
discretemaths
0
votes
0
answers
ISI Tomato Book
The value of $\sum \binom{k}{i} \binom{Mk}{100i} [(ki)/(M100)]/ \binom{M}{100}$, where M – k > 100, k > 100 and $\binom{m}{n}$= m!/{(m – n)!n!} equals (summation running from i = 0 to i = 100) (a) k/M (b) M/k (c)$k/M^{2}$ (d) $M/k^{2}$
asked
May 13
in
Combinatory
by
PSDesai09
(
5
points)

19
views
combinatory
combinatory
discretemaths
0
votes
1
answer
Find no of Hamiltonian cycles in kn,n
How many Hamiltonian cycles are there in complete bipartite graph K n,n
asked
May 9
in
Graph Theory
by
SANDEEP1729
(
5
points)

12
views
hamiltoniangraph
graphtheory
combinatory
0
votes
0
answers
Graph theory 3Ordered trees possible for a given no of nodes
asked
Apr 28
in
Graph Theory
by
ramcharantej_24
(
13
points)

19
views
trees
combinatory
graphtheory
discretemaths
graph
0
votes
0
answers
GATE19941.6, ISRO200829 Video Solution
The number of distinct simple graphs with up to three nodes is $15$ $10$ $7$ $9$
asked
Apr 18
in
Graph Theory
by
admin
(
193
points)

3
views
gate1994
graphtheory
combinatory
normal
isro2008
counting
videosolution
0
votes
0
answers
GATE201846 Video Solution
The number of possible minheaps containing each value from $\{1,2,3,4,5,6,7\}$ exactly once is _______
asked
Apr 18
in
Combinatory
by
admin
(
193
points)

13
views
gate2018
combinatory
numericalanswers
videosolution
0
votes
0
answers
GATE2016126 Video Solution
The coefficient of $x^{12}$ in $\left(x^{3}+x^{4}+x^{5}+x^{6}+\dots \right)^{3}$ is ___________.
asked
Apr 18
in
Combinatory
by
admin
(
193
points)

4
views
gate20161
combinatory
generatingfunctions
normal
numericalanswers
videosolution
0
votes
0
answers
GATE201065 Video Solution
Given digits$ 2, 2, 3, 3, 3, 4, 4, 4, 4$ how many distinct $4$ digit numbers greater than $3000$ can be formed? $50$ $51$ $52$ $54$
asked
Apr 18
in
Numerical Ability
by
admin
(
193
points)

7
views
gate2010
numericalability
combinatory
normal
videosolution
0
votes
0
answers
GATE2016127 Video Solution
Consider the recurrence relation $a_1 =8 , a_n =6n^2 +2n+a_{n1}$. Let $a_{99}=K\times 10^4$. The value of $K$ is __________.
asked
Apr 18
in
Combinatory
by
admin
(
193
points)

3
views
gate20161
combinatory
recurrence
normal
numericalanswers
videosolution
0
votes
0
answers
GATE20181 Video Solution
Which one of the following is a closed form expression for the generating function of the sequence $\{a_n\}$, where $a_n = 2n +3 \text{ for all } n=0, 1, 2, \dots$? $\frac{3}{(1x)^2}$ $\frac{3x}{(1x)^2}$ $\frac{2x}{(1x)^2}$ $\frac{3x}{(1x)^2}$
asked
Apr 18
in
Combinatory
by
admin
(
193
points)

4
views
gate2018
generatingfunctions
normal
combinatory
videosolution
0
votes
0
answers
GATE2017247 Video Solution
If the ordinary generating function of a sequence $\left \{a_n\right \}_{n=0}^\infty$ is $\large \frac{1+z}{(1z)^3}$, then $a_3a_0$ is equal to ___________ .
asked
Apr 18
in
Combinatory
by
admin
(
193
points)

4
views
gate20172
combinatory
generatingfunctions
numericalanswers
normal
videosolution
0
votes
0
answers
GATE201921 Video Solution
The value of $3^{51} \text{ mod } 5$ is _____
asked
Apr 18
in
Combinatory
by
admin
(
193
points)

5
views
gate2019
numericalanswers
combinatory
modulararithmetic
videosolution
0
votes
0
answers
GATE200479 Video Solution
How many graphs on $n$ labeled vertices exist which have at least $\frac{(n^2  3n)}{ 2}$ edges ? $^{\left(\frac{n^2n}{2}\right)}C_{\left(\frac{n^23n} {2}\right)}$ $^{{\large\sum\limits_{k=0}^{\left (\frac{n^23n}{2} \right )}}.\left(n^2n\right)}C_k\\$ $^{\left(\frac{n^2n}{2}\right)}C_n\\$ $^{{\large\sum\limits_{k=0}^n}.\left(\frac{n^2n}{2}\right)}C_k$
asked
Apr 18
in
Graph Theory
by
admin
(
193
points)

9
views
gate2004
graphtheory
combinatory
normal
counting
videosolution
0
votes
0
answers
GATE201535 Video Solution
The number of $4$ digit numbers having their digits in nondecreasing order (from left to right) constructed by using the digits belonging to the set $\{1, 2, 3\}$ is ________.
asked
Apr 18
in
Combinatory
by
admin
(
193
points)

4
views
gate20153
combinatory
normal
numericalanswers
videosolution
0
votes
0
answers
GATE2014150 Video Solution
Let ܵ$S$ denote the set of all functions $f:\{0,1\}^4 \to \{0,1\}$. Denote by $N$ the number of functions from S to the set $\{0,1\}$. The value of $ \log_2 \log_2N $ is _______.
asked
Apr 18
in
Set Theory & Algebra
by
admin
(
193
points)

3
views
gate20141
settheory&algebra
functions
combinatory
numericalanswers
videosolution
0
votes
0
answers
GATE200475 Video Solution
Mala has the colouring book in which each English letter is drawn two times. She wants to paint each of these $52$ prints with one of $k$ colours, such that the colour pairs used to colour any two letters are different. Both prints of a letter can also be coloured with the same colour. What is the minimum value of $k$ that satisfies this requirement? $9$ $8$ $7$ $6$
asked
Apr 18
in
Combinatory
by
admin
(
193
points)

3
views
gate2004
combinatory
videosolution
0
votes
0
answers
GATE20171GA9 Video Solution
Arun, Gulab, Neel and Shweta must choose one shirt each from a pile of four shirts coloured red, pink, blue and white respectively. Arun dislikes the colour red and Shweta dislikes the colour white. Gulab and Neel like all the colours. In how many different ways can they choose the shirts so that no one has a shirt with a colour he or she dislikes? $21$ $18$ $16$ $14$
asked
Apr 18
in
Numerical Ability
by
admin
(
193
points)

11
views
gate20171
combinatory
numericalability
videosolution
0
votes
0
answers
GATE19992.2 Video Solution
Two girls have picked $10$ roses, $15$ sunflowers and $15$ daffodils. What is the number of ways they can divide the flowers among themselves? $1638$ $2100$ $2640$ None of the above
asked
Apr 18
in
Combinatory
by
admin
(
193
points)

5
views
gate1999
combinatory
normal
videosolution
0
votes
0
answers
GATE20034 Video Solution
Let $A$ be a sequence of $8$ distinct integers sorted in ascending order. How many distinct pairs of sequences, $B$ and $C$ are there such that each is sorted in ascending order, $B$ has $5$ and $C$ has $3$ elements, and the result of merging $B$ and $C$ gives $A$ $2$ $30$ $56$ $256$
asked
Apr 18
in
Combinatory
by
admin
(
193
points)

6
views
gate2003
combinatory
normal
videosolution
0
votes
0
answers
GATE200784 Video Solution
Suppose that a robot is placed on the Cartesian plane. At each step it is allowed to move either one unit up or one unit right, i.e., if it is at $(i,j)$ then it can move to either $(i + 1, j)$ or $(i,j + 1)$. How many distinct paths are there for the robot ... $(10,10)$ starting from the initial position $(0,0)$? $^{20}\mathrm{C}_{10}$ $2^{20}$ $2^{10}$ None of the above
asked
Apr 18
in
Combinatory
by
admin
(
193
points)

3
views
gate2007
combinatory
videosolution
0
votes
0
answers
GATE19981.23 Video Solution
How many sub strings of different lengths (nonzero) can be formed from a character string of length $n$? $n$ $n^2$ $2^n$ $\frac{n(n+1)}{2}$
asked
Apr 18
in
Combinatory
by
admin
(
193
points)

2
views
gate1998
combinatory
normal
videosolution
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