Problem Solving

I got the weighted average as ~28,333 hence answer B is correct. The q is why answer A is correct as well?

Thanks

it says to indicate all such amounts.
both a and b meet the criteria.

this question doesn't seem to be the same kind as what you'll see on the gmat.

I understand that A and B are correct. The q is why A is correct as well?

there are _more_ than twice as many employees in x as in y.

what _could_ the average be?


it can be anything less than 28333

Hi,
Let the number of employees in company X and Y be x and y respectively
Given that x > 2y
Average salary is [x(25000) + y(35000)]/x+y = 25K + 10Ky/(x+y)
x>2y => x+y > 3y => y/(x+y) < 1/3
So, 25k + 10k(y/x+y) < 25k + 10k/3 = 28,333
So, average can be any value between 25,000 and 28,333.
As A,B both lie in this range, either of them could be the average salary.