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by maten » Sat Jul 05, 2008 12:09 am
First convert the statement to an equation:

M:A:F = 7:8:10 tells you that the number of students in Marketing to Accounting to Finance is 7 to 8 to 10. The trick is to realize that the total students in M will be 7x where x is a number, therefore A will have 8x and likewise, F will have 10x since 7x:8x:10x = 7:8:10. This means:

7x + 8x + 10x = 500
25x = 500
x = 20

The question asks for students in F, which is 10x or 10*20 = 200.
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by wwallace1 » Sat Jul 05, 2008 1:55 am
thanks so much :)
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by sibbineni » Sun Jul 06, 2008 6:56 pm
simple case

finance
-----------------------------------*total no of students
marketing+finance+accounting

10

----------------*500==>200
7+10+8
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