A person has 4 coins each of different denomination what is the number of different sum of money the person can form(using one or more coins at a time)?
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Total umber of coins = 4.
We can select one or more coins at a time.
(1) Probability of selecting 1 coin out of 4 = 4C1 = 4
(2) Probability of selecting 2 coin out of 4 = 4C2 = 6
(3) Probability of selecting 3 coin out of 4 = 4C3 = 4
(4) Probability of selecting 4 coin out of 4 = 4C4 = 1
Total number of different sum of money = 4 + 6 + 4 + 1 = 15
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