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In a certain senior class, 75 percent of the male students

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Joined: 03 Jan 2005
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 [#permalink] New post 11 Apr 2006, 05:39
You guys are thinking too much for this question. If we know 75% of A is something, and 80% of B is something. Then if we combine the two we know the the total percentage would be between 75%-80%. And the final percentage is strictly dependent on the ratio of the two. If we get final percentage is 75% we know we have 100% A and if the final percentage is 80% we know we have 100% B. Otherwise it'll be somewhere in between.

Sometimes it's enough to just use your intuition. :)
_________________

Keep on asking, and it will be given you;
keep on seeking, and you will find;
keep on knocking, and it will be opened to you.

  [#permalink] 11 Apr 2006, 05:39

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In a certain senior class, 75 percent of the male students

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