Question

If A={1, 2, 3, 4, 5, 6, 7} then number of proper subsets of A is

• A. $2^7$
• B. $2^6$
• C. $2^7-1$
• D. $2^8-1$

Answer 1

Answer: (C)

$n(A)=7$. Number of subsets of $A=2^7-1$