SOLUTION: Here is problem. I know the answer but now the operation.. Music Class has 1 freshman, 6 sophmores and 11 juniors. 1/3rd of the class are seniors. I instantly just shouted 9

Question 153419: Here is problem. I know the answer but now the operation..
Music Class has 1 freshman, 6 sophmores and 11 juniors. 1/3rd of the class are seniors.
I instantly just shouted 9 but I don't know how I came up to it and need to know what the process is..
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Music Class has 1 freshman, 6 sophmores and 11 juniors. 1/3rd of the class are seniors.
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Let "x" be the number in the class.
(2/3)rd of the class = 1 + 6 + 11
(2/3)x = 18
x = 27 ( # in the class )
# of seniors = (1/3)*27 = 9
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You have it.
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Cheers,
Stan H.

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