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Nishi has 5 coins, each of the different denomination. Find the numberdifferent sums of money she can form. |
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Answer» Number of different sums of money she can form is equal to number of ways she select one or more coins. Therefore, Required number of ways `= .^(5)C_(1)+ .^(4)C_(2)+ .^(5)C_(3)+ .^(5)C_(4)+ .^(5)C_(5)` `=2^(5)-1=31` |
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