EAMCET Engineering 2009 Solved Paper

The total number of subsets of given set is 29=512
Case I When selecting only one even number {2,4,6,8}
Number of ways =‌4C1=4
Case II When selecting only two even numbers =‌4C2=6
Case III When selecting only three even numbers =‌4C3=4
Case IV When selecting only four even numbers =‌4C4=1
∴ Required number of ways
=512−(4+6+4+1)−1=496
[Here, we subtract 1 for due to the null set]