You volunteer to drive children at a charity event to the zoo. but you can fit only 6 of 20 children present in your van. how many different groups of 6 children can you drive?

Hi, can anyone show me how to do this problem? 100 points for this. in advance

Three people are traveling and need to exchange the currency of their native country for the currency of the country they are visiting. drag each exchange to the category that shows the ratio of currencies in that exchange.

In a sale there is 25% of all prices a chair costs £45 in sale how much was it before the sale