Hello zpwnchenWith no restrictions there are ways of choosing the women and ways of choosing the men; i.e. ways altogether.

a) We now find the number of ways of forming the committee to include the two problem women. With these women already selected we need more women from the remaining and men from . That's ways. So, excluding these choices, there remain possible ways.

b) Do this in the same way. Once the problem people have been selected, work out the number of possible choices from the remaining two groups, and subtract from .

Grandad