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Mathematics, 19.04.2021 19:40 mariaaalopezz

A survey of 71 families showed that: 40 have a son(s)
45 have a daughter(s)
18 had neither a son nor a daughter.
How many families had ONLY son(s)?​

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A survey of 71 families showed that: 40 have a son(s)
45 have a daughter(s)
18 had neithe...

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