Question 356527
A teacher asked her class to rasie their hand if they liked carrots. 11 students raised their hands. There were 9 students who raised their hands liking spinach. There were 7 students who did not like either of the vegetables. All 24 students in the class voted. how many students liked both carrots and spinach?
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liked (c and s) = liked(c) + liked(s)- liked (c or s)
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liked (c and s) = 11 + 9 - (24-7) = 20 - 17 = 3
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Cheers,
Stan H.