SOLUTION: there are 400 people, 1/10 are female and 1/8 are male. the rest are children, how many children are they?

Question 939653: there are 400 people, 1/10 are female and 1/8 are male. the rest are children, how many children are they?
Found 2 solutions by stanbon, 428225:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
there are 400 people, 1/10 are female and 1/8 are male. the rest are children, how many children are they?
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# of females:: (1/10)400 = 40
# of males:: (1/8)400 = 50
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# of children = 400 - (40+50) = 310
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Another way to work the problem::
1 - (1/10 + 1/8) = 1 - [(8+10)/80] = 1-[18/80] = 62/80
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# of children = (62/80)*400 = 5*62 = 310
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Cheers,
Stan H.
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Answer by 428225(90) (Show Source): You can put this solution on YOUR website!
First find the number of females there are by doing: 400 * 0.1 = 40 . There are 40 females
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Next do: 400 * 1/8 = 50. There are 50 males
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400-50-40 = 310 . There are 310 children.
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