Permutation and CombinationEasy
Question
The number of ways to put five letters in five envelopes when any one letter is kept in right envelope and four letters in wrong envelopes are-
Options
A.40
B.45
C.30
D.70
More Permutation and Combination Questions
The number of non-negative integral solutions of x1 + x2 + x3 + x4 ≤ n (where n is a positive integer) is...In a unique hockey series between India & Pakisthan, they decide to play on till a team wins 5 matches. The number of wa...The total number of words formed with the letters of the word ″SERIES″ is-...The total number of words which can be formed using all the letters of the word ″AKSHI″ if each word begins ...A bag contains 9 balls marked with digits 1,2,....,9. If two balls are drawn from the bag, then number of ways of gettin...