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Question

A market research group conducted a survey of 1000 consumers and reported that 720 consumers liked product A and 450 consumers liked product B. The least number that must have liked both products is:

A
170
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B
280
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C
220
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D
250
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Solution

The correct option is A 170
Total consumers =1000=n(AB)
Consumers who likes product A=720=n(a)
Consumers who like product B=450=n(B)
Now consumers who like both products =n(AB)=n(A)+n(B)n(AB)
=720+4501000
=170

1026731_1032164_ans_e65d13ba7613460683c1ac32f0a67f77.png

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