In a class, 50 students study mathematics, 45 study physics and 40 study chemistry. Of these, 20 study both mathematics and physics, 15 study both physics and chemistry, 18 study both mathematics and chemistry, and 8 study all three. How many students study exactly one of the three subjects?

MathematicsMediumHigh School (11–12)Functions and Calculus › Sets and Intervals JEE Main

In a class, $50$ students study mathematics, $45$ study physics and $40$ study chemistry. Of these, $20$ study both mathematics and physics, $15$ study both physics and chemistry, $18$ study both mathematics and chemistry, and $8$ study all three. How many students study exactly one of the three subjects?

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