Question

How many different sums of money can be made from 4coins of different denomination

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Answer 1

• 15 different sums

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There are various combinations of coins.

1 coin:

• 4 options

2 coins:

• 4C2 = 4!/(2!2!) = 6 options

3 coins:

• 4C3 = 4!/(3!1!) = 4 options

4 coins:

• 1 option

In total there are:

• 4 + 6 + 4 + 1 = 15 different sums