<PRE><B>Question 939653</B>
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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