Math Problem

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Math Problem

I need help wiht the following word problem given to my daughter for math -

What is the least amount of children a family can have if each child has at least two brothers and one sister?

October 6, 2009, 1:27 pm by Guerita74

It is 5 my friend. Start with one girl and the girls should at least have a sister and two brothers. Now you have 4 kids. But think about it,

girl      girl     boy     boy

you are done with both girls (they each have atleast one sister and two brothers). Let's look at the boys, Does each boy have at least two brothers? NO. So we need to introduce another boy. Now you have,

girl   girl   boy    boy    boy,

Each boy has at least two brothers and a sister and each girl has at least a sister and two brothers.

November 29, 2009, 9:11 pm by Berhane14

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