Sets Practice Test 1

We have
P - Q = {8, 9, 10, 11} - {9, 10, 13, 14} = {8, 11}
P - R = {8, 9, 10, 11} - {10, 11, 14, 17} = {8, 9}
Q ∩ R = {9, 10, 13, 14} ∩ {10, 11, 14, 17} = {10, 14}
(P - Q ∩ R) = {8, 9, 10, 11} - {10, 14} = {8, 9, 11}