Reasoning Class 5 Other

Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.

In a class of 30 students, 20 like Math and 15 like Science. If every student likes at least one subject, how many like both?

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A 5
B 10
C 15
D 35

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Answer: A. 5

Add the students who like Math (20) and Science (15) to get a total of 35.
Since there are only 30 students in the class, the "extra" students must be the ones counted twice.
Therefore, 5 students like both subjects.

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In a class of 30 students, 20 like Math and 15 like Science. If every student likes at least one subject, how many like both?

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