MEDIUM
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IMPORTANT
Earn 100

Total number of even divisors of 2079000 which are divisible by 15 are -

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Important Questions on Permutation and Combination

HARD
JEE Main/Advance
IMPORTANT
The number of five digit numbers that can be formed using all the digits 0, 1, 3, 6, 8 which are -
HARD
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IMPORTANT
All the 7 digit numbers containing each of the digits 1, 2, 3, 4, 5, 6, 7 exactly once and not divisible by 5 are arranged in the increasing order. Then -
MEDIUM
JEE Main/Advance
IMPORTANT
There are p+q different books on different topics in Mathematics. pq

If L= the number of ways in which these books are distributed between two students X and Y such that X get p books and Y gets q books.

M= The number of ways in which these books are distributed between two students X and Y such that one of them gets p books and another gets q books.

N= The number of ways in which these books are divided into two groups of p books and q books then -

HARD
JEE Main/Advance
IMPORTANT
Number of dissimilar terms in the expansion of x1+x2++xn3 is -
MEDIUM
JEE Main/Advance
IMPORTANT
A persons wants to invite one or more of his friend for a dinner party. In how many ways can he do so if he has eight friends :-
MEDIUM
JEE Main/Advance
IMPORTANT
If Pn, n denotes the number of permutations of n different things taken all at a time then Pn, n is also identical to :-
HARD
JEE Main/Advance
IMPORTANT
Which of the following statement(s) is/are true :-
HARD
JEE Main/Advance
IMPORTANT
If C2n+1+2C22+C23+C24+...+C2n=12+22+32+.....+1002, then the value of n is