Math tip #13 (Updated On Thursday, September 05, 2013)
If a:b = 3:4 then a and b are not equal to 3 and 4 respectively. a = 3x and b = 4x where x is any constant.
(a,b) can be (15,20),(18,24),(3,4), (30,40)...
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GMAT reading comprehension , a sneak peak
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