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anonymous
 one year ago
The girls' average score is 30. The boys' average score is 24. If there are twice as many boys as girls, what is the overall average?
anonymous
 one year ago
The girls' average score is 30. The boys' average score is 24. If there are twice as many boys as girls, what is the overall average?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what are the options

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0its not multiple choice

asnaseer
 one year ago
Best ResponseYou've already chosen the best response.1lets call the number of girls "g" then there are "2g" boys agreed so far?

asnaseer
 one year ago
Best ResponseYou've already chosen the best response.1this is because it says "If there are twice as many boys as girls"

asnaseer
 one year ago
Best ResponseYou've already chosen the best response.1ok, so if there are "g" girls and these girls have an average score of 30, then what would their total score be?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1434819390316:dw

asnaseer
 one year ago
Best ResponseYou've already chosen the best response.1the denominator should be "g+b"

asnaseer
 one year ago
Best ResponseYou've already chosen the best response.1you can then replace the "b" with "2g"

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0but isn't it twice as many boys?

asnaseer
 one year ago
Best ResponseYou've already chosen the best response.1overall average\(=\frac{24b+30g}{b+g}\) and we know: \(b=2g\)

asnaseer
 one year ago
Best ResponseYou've already chosen the best response.1the denominator becomes 3g yes

asnaseer
 one year ago
Best ResponseYou've already chosen the best response.1similarly, replace b with 2g in the numerator

asnaseer
 one year ago
Best ResponseYou've already chosen the best response.1what have you got now?

asnaseer
 one year ago
Best ResponseYou've already chosen the best response.1the "g"'s should have cancelled out
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