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Recent questions tagged counting
3
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61
GO Classes 2023 | IIITH Mock Test 1 | Question: 4
How many ways are there to arrange the $12$ letters of $\text{AAABBBBCCCCC}$ without having two $\text{Cs}$ together? $2652$ $1960$ $1826$ $2260$
GO Classes
asked
in
Combinatory
Mar 26, 2023
by
GO Classes
614
views
goclasses2023-iiith-mock-1
goclasses
combinatory
counting
1-mark
2
votes
1
answer
62
GO Classes 2023 | IIITH Mock Test 1 | Question: 96
All the rearrangements of the word $\text{“DEMAND"}$ are written without including any word that has two $\text{D’s}$ appearing together. If these are arranged alphabetically, what would be the rank of $\text{“DEMAND"}?$ $36$ $74$ $42$ $86$
GO Classes
asked
in
Quantitative Aptitude
Mar 26, 2023
by
GO Classes
508
views
goclasses2023-iiith-mock-1
goclasses
quantitative-aptitude
combinatory
counting
1-mark
4
votes
1
answer
63
TIFR CSE 2023 | Part A | Question: 2
How many distinct rectangles can be formed using the vertices in the grid shown below? Squares are also counted as rectangles, and two rectangles are distinct if either their top-left vertices are different or their bottom-right vertices are different. ... $16$ $25$ $36$ $64$ $100$
admin
asked
in
Combinatory
Mar 14, 2023
by
admin
660
views
tifr2023
combinatory
counting
3
votes
0
answers
64
TIFR CSE 2023 | Part A | Question: 12
Suppose is a piece on a chess board that attacks squares that are exactly two steps in the vertical direction, and squares that are adjacent horizontally (as marked with a "*" figure in the image below) What is the maximum number of these pieces that can ... other? (Note that each square is allowed to contain at most one piece.) $4$ $8$ $16$ $24$ $32$
admin
asked
in
Combinatory
Mar 14, 2023
by
admin
478
views
tifr2023
combinatory
counting
1
vote
0
answers
65
Kenneth Rosen, exercise 6.1, Qs - 42 (d)
How many 4-element DNA sequences contain exactly three of the four bases A, T, C, and G? Solution given: There are four ways to choose which letter is to occur twice and three ways to decide which of the other letters to leave ... wrong. It would be of great help if you can show what combinations my approach is not including but the given solution includes.
Pineapple
asked
in
Combinatory
Mar 3, 2023
by
Pineapple
1.1k
views
kenneth-rosen
discrete-mathematics
counting
combinatory
1
vote
1
answer
66
#Combinatorics #Self doubt
How many 3 digits number are there which are divisible by 3 and repetition of digits NOT allowed.?
Hattbc
asked
in
Combinatory
Feb 17, 2023
by
Hattbc
509
views
counting
combinatory
14
votes
3
answers
67
GATE CSE 2023 | Question: 38
Let $U=\{1,2, \ldots, n\},$ where $n$ is a large positive integer greater than $1000.$ Let $k$ be a positive integer less than $n$. Let $A, B$ be subsets of $U$ with $|A|=|B|=k$ and $A \cap B=\emptyset$. We say that a permutation of $U$ separates $A$ from $B$ if ... $2\left(\begin{array}{c}n \\ 2 k\end{array}\right)(n-2 k) !(k !)^{2}$
admin
asked
in
Combinatory
Feb 15, 2023
by
admin
6.3k
views
gatecse-2023
combinatory
counting
2-marks
1
vote
1
answer
68
GATE CSE 2023 | Memory Based Question: 16
How many permutations of $U$ separate $A$ from $B?$ $2\left(\begin{array}{c}n \\ 2 k\end{array}\right)(n-2 k) !(k!)^2$ $\left(\begin{array}{c}n \\ 2 k\end{array}\right)(n-2 k)!(n!)$ $n!$ $\left(\begin{array}{c}n \\ 2 k\end{array}\right)(n-2 k) !(k !)^2$
GO Classes
asked
in
Combinatory
Feb 5, 2023
by
GO Classes
1.0k
views
memorybased-gatecse2023
goclasses
combinatory
counting
0
votes
1
answer
69
#Combinatorics and Counting # Permutations and Combinations
If each of ‘a’ points on a straight line is joined to each of ‘b’ points on another straight line, excluding the points on the given two lines,then which of the following represents the number of points of intersection of these lines? Select all that apply. (ab(a-1)(b-1))/4 (ab(a-1)(b-1))/2 ab C(a,2) * C(b,2)
lekh
asked
in
Combinatory
Jan 21, 2023
by
lekh
315
views
combinatory
counting
0
votes
1
answer
70
Operating System
How c came into picture.
Overflow04
asked
in
Operating System
Dec 31, 2022
by
Overflow04
317
views
operating-system
counting
deadlock-prevention-avoidance-detection
test-series
0
votes
1
answer
71
Number Of Substrings | Made Easy Test Series
The number of subwords for w=’SCALABLE” is equal to: 34 35 37
Souvik33
asked
in
Combinatory
Dec 21, 2022
by
Souvik33
843
views
combinatory
counting
made-easy-test-series
1
vote
1
answer
72
Unacademy All India Mock 18 Dec. 2022.Counting
Let S={0,1,2,3,….,9}. The number of subsets of 5 contains at least two even numbers? HELP ANYONE Ans.-832
Rajender gill
asked
in
Set Theory & Algebra
Dec 19, 2022
by
Rajender gill
635
views
set-theory&algebra
counting
functions
1
vote
0
answers
73
DRDO CSE 2022 Paper 1 | Question: 14
Derangements are permutations $\pi$ of the set $\{1,2, \ldots, n\}$ such that $\pi(i) \neq i.$ Compute the number of derangements on the set $1,2, \ldots, n$.
admin
asked
in
Combinatory
Dec 15, 2022
by
admin
172
views
drdocse-2022-paper1
combinatory
counting
7-marks
descriptive
2
votes
1
answer
74
DRDO CSE 2022 Paper 1 | Question: 18
A gardener wants to buy $3$ neem plants, $5$ rose plants and $1$ banyan plant from a nursery having $7$ neem, $10$ rose and $6$ banyan plants. How many choices does a gardener have?
admin
asked
in
Combinatory
Dec 15, 2022
by
admin
310
views
drdocse-2022-paper1
combinatory
counting
5-marks
descriptive
1
vote
1
answer
75
DRDO CSE 2022 Paper 1 | Question: 19
How many seven digit numbers are possible with exactly four $4 \mathrm{s}?$
admin
asked
in
Combinatory
Dec 15, 2022
by
admin
346
views
drdocse-2022-paper1
combinatory
counting
5-marks
descriptive
0
votes
1
answer
76
Solve the simultaneous recurrence relations
an = an−1 + bn−1 bn = an−1 − bn−1 with a0 = 1 and b0 = 2.
chinman12
asked
in
Combinatory
Nov 25, 2022
by
chinman12
374
views
discrete-mathematics
counting
recurrence-relation
descriptive
0
votes
0
answers
77
Consider a Diffie-Hellman scheme with a common prime q=11 and a primitive root a=2. a. If user A as public key YA=9 what is as private key XA? b. If user B has public key YB= 3 what is the shared secret key K?
JustPakYt
asked
in
Computer Networks
Nov 13, 2022
by
JustPakYt
1.2k
views
computer-networks
network-security
deadlock-prevention-avoidance-detection
counting
0
votes
0
answers
78
Consider a system having 22 resources of the same type. These resources are shared by 4 processes P, Q, Rand Shaving peak demands of 3, 6, a and b respectively. How many ordered pairs (a, b) are possible, such that the system is deadlock free?
damz1499
asked
in
Operating System
Nov 7, 2022
by
damz1499
1.1k
views
deadlock-prevention-avoidance-detection
combinatory
counting
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