Question

let€={5,6,8,9,10,13,15},A={6,9,10} find a​

Answer 1

Step-by-step explanation:

Number of elements in A=10

Number of subsets of A containing exactly two elements

= Number of ways we can select 2 elements from 10 elements

10

C

2

=

2

10×9

=45

∴ Number of subsets of A containing exactly two elements =45