waec model questions vol1 2023 mathematics
Objective • Question 9
Question 9
WAEC_MODEL_QUESTIONS_VOL1
•
2023
In a school of 120 students, 70 study Mathematics, 55 study Physics and 45 study Chemistry. The numbers who study both Mathematics and Physics, Mathematics and Chemistry, and Physics and Chemistry are 30, 25 and 20 respectively. Ten students study none of these subjects. How many students study all three subjects?
Answer Options
A.
5
B.
20
Correct Answer
C.
15
D.
10
Correct Answer
C
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