P = {3, 9, 11, 13} and Q = {3, 7, 9, 15} are subset of the universal set ξ = {1, 3, 7, 9, 11, 13, 15} find PI ∩ QI
- {3, 9}
- {5, 7, 9}
-
{1}
- {1, 11}
The correct answer is: C
Explanation
PI = {1, 7, 15} ; QI = {1, 13, 11}PI ∩ QI = {1}