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Question

A market research group conducted a survey of 1000 consumers and reported that 720 consumers like product A and 420 consumers like product B. Then, the least number of consumers that must have liked both the products is.

A
140
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B
180
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C
210
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D
190
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Solution

The correct option is A 140
Total consumers =1000
Like product A=n(A)=720
Like product B=n(B)420
n(AB) (Both the products) =n(A)+n(B)n(AB)
=720+4201000
=140
673877_632410_ans_c415a537bfe646a3875abfae98042f1d.png

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