Ana has one coin of 5 cents, one coin of 10 cents, one coin of 20 cents and one coin of 50 cents. how many different values can she make with these coins?

Ana has 4 coins with different values (5, 10, 20, 50) and you are asked to find how many different sums they can make. You can see every value as a separate combination and multiply it.

There is 1 coin for every value and it can be either used or not used, so there are two probabilities for each coin value. The calculation would be:

C (2,1) = 2!/1! = 2

There are 4 values of coins, so the total probability would be:

4 * C (2,1) = 4*2=8 ways