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Robert Linda

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14 Sep 2007, 07:19
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Problem attached not sure why the answer is E
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14 Sep 2007, 07:54
Parbe wrote:
Problem attached not sure why the answer is E

Lets say the number of boxes is x. linda packs 3/10x. from stmt A

now from stmt 2 if pat packed y boxes then robert packs y + 10.

combining both we have

y + y + 10 = 7/10x or y = (7/10x - 10)/2

ratio of robert's to pat's is y + 10 / y. substituting it with x does not give the value. so E

the intutive way would be .. since we only have percentages and 10 is an absolute number , we cannot get the ratio as there can be different number of boxes resulting in the same percentage.
Re: Robert Linda   [#permalink] 14 Sep 2007, 07:54
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