EASY
JEE Advanced
IMPORTANT
Earn 100

Total number of non-negative integral solutions of x1+x2+x3=10 is equal to

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Important Questions on Permutation and Combination

HARD
JEE Advanced
IMPORTANT
Total number of positive integral solutions of x1+x3+2x3=15 is equal to
HARD
JEE Advanced
IMPORTANT
Total number of ways in which 15 identical blankets can be distributed among 4 persons, so that each of them gets at least two blankets, is
MEDIUM
JEE Advanced
IMPORTANT
Total number of 3 letter words that can be formed from the letter of the word AAAHNPRRS is equal to
HARD
JEE Advanced
IMPORTANT
15 identical balls have to be put in 5 different boxes. Each box can contain any number of balls. Total number of ways of putting the balls into box, so that each box contains at least 2 balls, is equal to
HARD
JEE Advanced
IMPORTANT
The minimum marks required for clearing a certain screening paper is 210 out of 300. The screening paper consists of 3 sections each of Physics, Chemistry and Mathematics. Each section has 100 as maximum marks. Assuming, there is no negative marking and marks obtained in each section are integers, the number of ways in which a student can qualify the examination, assuming no cut-off limit, is
EASY
JEE Advanced
IMPORTANT
The number of ways of distributing 10 identical objects among 8 persons (one or many persons may not be getting any object), is
MEDIUM
JEE Advanced
IMPORTANT
A bag contains 3 black, 4 white and 2 red balls, all the balls being different. The number of selections of at most 6 balls containing balls of all the colours, is
EASY
JEE Advanced
IMPORTANT
The number of ways to give 16 different things to three persons, so that B gets 1 more than A and C gets 2 more than B, is