Permutation and CombinationEasy
Question
Everybody in a room shakes hands with every body else. If total number of hand-shaken is 66 then total number of persons in the room is-
Options
A.11
B.12
C.13
D.14
More Permutation and Combination Questions
A 5 digit number divisible by 3 is to be formed using the numerals 0, 1, 2, 3, 4 & 5 without repetition. The total numbe...The number of signals that can be made with 3 flags each of different colour by hoisting 1 or 2 or 3 above the other, is...In how many ways can 6 prizes be distributed equally among 3 persons?...If all the letters of the word ″QUEUE″ are arranged in all possible manner as they are in a dictionary, then...The number of different proper factors of 3780 is-...