desiguy wrote:

Super Corp employs w women and m men. The avg age of all the women is 31 and the avg age of all men is 33. What is the avg age of all employees at Super corp?

1) 8w/3m = 3m/2w

2) There are 100 more men than women employed at Super Corp.

Please explain.

Is the answer (A).

Sum of womens age = 31w

Sum of mens age = 33m

Average age of employee = 31w + 33m / (w + m)

From (1) we can arrive at m = 4/3 * w

Substitute in equation and we can find the answer. Suff.

From (2) we only know that m - w = 100. Insuff.

Hence (A)