P is the set of primes between 0 and 10. Q is the set of odd numbers between 0 and 10. Find the union of elements in P not in Q and elements in Q not in P.

Question 476 of 480

P is the set of primes between 0 and 10. Q is the set of odd numbers between 0 and 10. Find the union of elements in P not in Q and elements in Q not in P.

{2, 9}
{9}
{1, 9}
{1, 2, 9}

Correct Answer: A

Explanation

P = {2, 3, 5, 7}. Q = {1, 3, 5, 7, 9}. P - Q = {2}. Q - P = {1, 9}. Their union = {2} ∪ {1, 9} = {1, 2, 9}. But option A is {2,9}? Wait, re-read: 'the union of elements in P that are not in Q and the elements in Q that are not in P.' That is (P-Q) ∪ (Q-P) = {2} ∪ {1,9} = {1,2,9}. That is option D. The provided options suggest D is correct.