Question

The number of subsets of $\\{1, 2, 3 ,............,9\\}$ containing at least one odd number is

• A. 324
• B. 396
• C. 496
• D. 512

Answer 1

Answer: (C)

496

Answer 2

Reqd. number of subsets = $2^9 - 2^4$
= 512 - 16 = 496