Asked by lak

Juan has twice as many brothers as sisters. His sister Maria has 5 times as many brothers than sisters. How many children are in the family?
Answered by Steve
if there are b boys and g girls,

b-1 = 2g
5(g-1) = b

5g-5 = 2g+1
3g = 6
g = 2
so, b=5

There are b+g=7 children
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