Probability and Conditional Probability

SAT Math· difficulty 2/5

In a survey of 150 people: 40 like coffee only, 30 like tea only, 50 like both, 30 like neither. How many like coffee (including those who like both)?

  • A

    90

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  • B

    100

  • C

    40

  • D

    70

Explanation

Like coffee = coffee only + both = 40+50=9040 + 50 = 90.

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