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paper test question total number of students?

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Re: paper test question total number of students?

by parallel_chase » Fri Sep 12, 2008 5:22 am
ifthyder wrote:answer is 240. please explain
Let x be total number of students

40 + x/3 = science

1/4 [40 + x/3] = physics = x/8

1/4 [40 + x/3] = x/8

40 + x/3 = x/2

120+x = 3x/2

240 + 2x = 3x

x = 240

Hope this helps.
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