JEE Main 2012 Mathematics question
If P(S) denotes the set of all subsets of a given set S, then the number of one-to-one functions from the set S = {1, 2, 3} to the set P(S) is
Answer: (3)
Solution
P(S) has elements. One-one functions from a 3-element set into an 8-element set: , option (3).