salary ds

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salary ds

by divya23 » Wed Jun 01, 2011 10:01 pm
fOR Each month of next year,company R monthly revenue target is x $ > than it monthly revenue target for the preceding month.wat is the target for march next year?
1.target for dec next yr is 310000
2.target for sept next year is 30000 > than rev for june next year.
[spoiler]OA = BOTH [/spoiler]
Source: — Data Sufficiency |

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by cans » Wed Jun 01, 2011 10:41 pm
k means 1000 (its not a variable)
let target for jan=t.
then for feb = t+x
for nth month = t+(n-1)x (n goes from 1 to 12)
to find t+2x
a) t+11x=310k
insufficient. 2 variables, 1 equation.
b) t+8x = 30k+t+5x =>x=10k
we don't know t, insufficient.
a&b) x=10k, t+11xk=310k =>t=310-110=200k
thus for march t+2x = 220k
IMO C

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by smackmartine » Thu Jun 02, 2011 12:01 am
IMO C

1.target for dec next yr is 310000

we do not know the difference by which revenue for each successive month increases. So Insufficient.

2.target for sept next year is 30000 > than rev for june next year.

let difference by which revenue for each successive month increases be "x" and revenue in June be "y"

so, revenues in July, Aug ,and Sept will be y+x, y+2x and y+3x respectively.

Given that, target for sept next year - rev for june next year = 30000 => (y+3x) - (y)= 30000 => x = 10000

Because we have no info about revenue in any of the months we cannot calculate the target for march next year.

So Insufficient.

Combining 1 and 2
we know the December revenues and the difference between successive months' revenues, we can calculate the target for march next year.(No need to calculate).
So, Sufficient.