Simple!! 5 female deer and 5 male deer

I assume the numbers you give in your question (I used to hate word problems in math class[:@]) are the deer herd after hunting season. So with 10 additional deer the next year, 5 doe and 5 buck need to be harvested to keep the herd at the same OW and B/D.

My best effort, do you give partial credit DD!! LOL!!!