Permutation and CombinationHard
Question
A set contains (2n + 1) elements. The number of subset of the set which contain at most n elements is : -
Options
A.2n
B.2n+1
C.2n-1
D.22n
More Permutation and Combination Questions
How many numbers between 30000 and 40000 can be formed with the digits 2,3,5,6,9 if each digit can be repeated any numbe...From 6 different novels and 3 different dictionaries, 4 novels and 1 dictionary are to be selected and arranged in a row...Out of seven consonants and four vowels, the number of words of six letters, formed by taking four consonants and two vo...The number of ways is which an examiner can assign 30 marks to 8 questions, giving not less than 2 marks to any question...In how many ways 4 paintings can be hung on 4 walls of a room so that (i) one painting is hung on each wall and (ii) any...