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In a survey it was found that 21 people liked product A, 26 liked product B and 29 liked product C. If 14 people liked products A and B, 12 people liked products C and A, 14 people liked products B and C and 8 liked all the three products.
Q. 16 In a survey it was found that 21 people liked product A, 26 liked product B and 29 liked product C. If 14 people liked products A and B, 12 people liked products C and A, 14 people liked products B and C and 8 liked all the three products. Find how many liked product C only.
Answers (1)
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n(A) = 21
n(B) = 26
n(C) = 29
n( A B) = 14
n( A C) = 12
n (B C ) = 14
n( A B
C) = 8
n(liked product C only) = 29 - 4 -8 - 6 = 11
11 people like only product C.
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