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Meera has exactly one coin each of ₹1, ₹2, ₹5 and ₹10. Using one or more of these coins, how many different sums of money can she pay?

Competition practicePermutations & Combinations
  • A15
  • B16
  • C4
  • D24

Step-by-Step Solution

Each coin is used or not: , minus the empty choice: 15. All the subset totals are different here, so there are 15 sums.
Answer: A) 15

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