There are 7 students who like math, 9 students who like logical reasoning. If there are 15 students in the class and 1 student likes both math and logical reasoning, find the number of students who neither like math nor logical reasoning.

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Solution

The correct option is A
0

Let the number of students who like math be A

Let the number of students who like logical reasoning be B

Let the number of people who like math and logical reasoning be C

The number of people who likes math or logical reasoning = A + B - C

The number of people who doesn't like math or logical reasoning = 15 - (A + B - C)

= 15 +1 -7 - 9 = 0.

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