dj wrote:

Titleist wrote:

This one can be solved with absolutely no calculation. If she sold two tranches - one at 10% profit and the other at 6% profit (with the weighted after being 9% profit) then she must have sold more than half at 10% profit.

yes, your logic will work in this particular case, but we need to calculate if the answer choices are close.

good work..!

Thanks Dj, I agree - this problem is a mid 500 level question - if it were a mid 600 then the answer choices would be closer and I would have to get off my lazy fanny and actually do some calculations!