From a group of 6 candidates, a committee of 2 people is selected. in how many different ways can the committee be selected? (explain pls)

You are cycling around europe with friends. you book into a hostel and you ask the owner what the ratio of men to women is currently staying there. there are 24 men and 6 women. what is the ratio of men to women in its simplest form?

Roger could feed 5 walruses with 4 kilograms of fish. how many walruses could he feed with 7.2 kilograms of fish?

Meee i honestly dont know what this question talking about