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how many different sums of money can be formed by taking two of the following coins; 5,10,25,50 and 1?

Sagot :

5 + 10, 5 + 25, 5 + 5, 5 + 1 with the addend of 5.
10 + 25, 10 + 50, 10 + 1, with the addend of 10.
25 + 50, 25 + 1, with the addend of 25.
50 + 1, with the addend of 50
 with the value of 1

4 + 3 + 2 + 1 = 10

Simplier Method:
5 x 2 =10