48 less than 4 times a number is equal to the number

Ineed me i stuck and i don’t want to get it wrong

Out of five men and five women, we form a committee consisting of four different people. assuming that each committee of size four is equally likely, find the probabilities of the following events: 1. the committee consists of two men and two women 2. the committee has more women than men. 3. the committee has at least one man. for the remainder of the problem assume that alice and bob are among the ten people being considered. 4. both alice and bob are members of the committee.

Carly made a beaded necklace. 4/18 of the beads are blue and 1/3 of the beads are green. use benchmark fractions to estimate about what fraction of the beads in the necklace are blue or green. explain