(singleton/null)6. If A = {1, 2, 3, 4, 5, ..., 10), then the number of

1.	(singleton/null)6. If A = {1, 2, 3, 4, 5, ..., 10), then the number ofsubsets of A which consists of 2, 4, 6, 8, and 10 butnot 1, 3, 5, 7, and 9 is
Answer» Answer: 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

(singleton/null)6. If A = {1, 2, 3, 4, 5, ..., 10), then the number ofsubsets of A which consists of 2, 4, 6, 8, and 10 butnot 1, 3, 5, 7, and 9 is

Answer»

Answer:

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

10×9

=45

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