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Recent questions tagged permutation-and-combination

7 7 votes
3 3 answers
GATE Civil 2024 Set 1 | GA | Question: 7
​​​​​Three distinct sets of indistinguishable twins are to be seated at a circular table that has $8$ identical chairs. Unique seating arrangements are defined by the rel...
7 7 votes
3 answers 3 answers
GATE Civil 2021 Set 2 | GA | Question: 5
Four persons $P, Q, R$ and $S$ are to be seated in a row. $R$ should not be seated at the second position from the left end of the row. The number of distinct seating arr...
5 5 votes
3 answers 3 answers
GATE Civil 2021 Set 1 | GA | Question: 5
Four persons $\text{P, Q, R}$ and $\text{S}$ are to be seated in a row, all facing the same direction, but not necessarily in the same order. $\text{P}$ and $\text{R}$ ca...
9 9 votes
2 answers 2 answers
GATE Civil 2015 Set 2 | GA | Question: 8
How many four digit numbers can be formed with the $10$ digits $0,1,2,…,9$ if no number can start with $0$ and if repetitions are not allowed?
5 5 votes
3 answers 3 answers
GATE Civil 2018 Set 2 | GA | Question: 4
A three-member committee has to be formed from a group of $9$ people. How many such distinct committees can be formed?$27$$72$$81$$84$
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