Question
Quantitative Aptitude Question on Permutations and Combinations
How many different subsets of the set {10, 14, 17, 24} are there that contain an odd number of elements?
A
8
B
6
C
3
D
10
Answer
8
Explanation
Solution
Choosing 1 or 3 from the 4 values will make a subset that contains an odd number.
so choose 1 out of 4 is 4c1 = 4
and choose 3 out of 4 is 4c3 = 4
total = 4+4 = 8
The correct option is (A): 8