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Aspirant008
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gmat prep q 3
Source: Beat The GMAT — Data Sufficiency |
look at first 5 numbers, there average will be 80
sum 5*80,
next two 2*105
next 3 3*130
average of the series (5*80 +2*105+ 3*130)/10
now check which numbers are less than average - 1*SD
answer will be two numbers
Is there any better way?
sum 5*80,
next two 2*105
next 3 3*130
average of the series (5*80 +2*105+ 3*130)/10
now check which numbers are less than average - 1*SD
answer will be two numbers
Is there any better way?
