Given that P = {x: x is a multiple of 5}, Q = {x: x
FURTHER MATHEMATICS
WAEC 2022
Given that P = {x: x is a multiple of 5}, Q = {x: x is a multiple of 3} and R = {x: x is an odd number} are subsets of μ = {x: 20 ≤ x ≤ 35}, (P?Q)∩R.
- A. {20, 21, 25, 30, 33}
- B. {21, 25, 27, 33, 35}
- C. {20, 21, 25, 27, 33, 35}
- D. {21, 25, 27, 30, 33, 35}
Correct Answer: B. {21, 25, 27, 33, 35}
Explanation
P = { 20, 25, 30, 35}, Q = {21, 24, 27, 30, 33}, R = {21, 23, 25, 27, 29, 31, 33, 35}
(P?Q)∩R = {20, 21, 24, 25, 27, 30, 33, 35} ∩ {21, 23, 25, 27, 29, 31, 33, 35}
= {21, 25, 27, 33, 35}
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