Question

A company makes 140 bags

30 of the bags buttons but no zips.

27 of the bags have zips but no buttons.

20 of the bags have neither zips or buttons.

How many bags have zips on them

Answer 1

90 bags have zips on them.

Explanation:

140 bags - total

30 bags - no zips + buttons

27 bags - zips + no buttons

20 - no zips + no buttons

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140 - 30 = 110

110 - 20 = 90

Answer 2

50 because 30 + 20 = 50