Question

The number of the proper subset of {a, b, c} is:

• A. 3
• B. 8
• C. 6
• D. 7

Answer 1

Answer: (D)

Note: The number of proper subsets of {1, 2, 3, ..... n} is $2^n-1$.
Thus the no of proper subset of {a, b, c} is $2^3-1=7$.