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Of the 120 households in an area, 55 have cars, 35 have motor bikes, and 20 have both cars and motor bikes. How many of the households in the area have neither cares nor motor bikes?

Of the 120 households in an area, 55 have cars, 35 have motor bikes, and 20 have both cars and motor bikes. How many of the households in the area have neither cares nor motor bikes? Correct Answer 50

Given total = 120, n(C) = 55, n( B) = 35 and n (C U B) = 20, none = ? Total = n(c) + n(B) n(CUB) + none 120 = 55 + 35 - 20 + none None = 50 (ans)

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