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Rakesh has 15 coins, all ₹2 or ₹5, worth ₹51 in total. He says nine of them are ₹5 coins. Check, and find the correct number of ₹5 coins.

Class 7Checking Solutions by TrialSimple Equations
  • AWrong; 7 coins of ₹5
  • BWrong; 8 coins of ₹5
  • CRight; 45 + 12 = 51
  • DWrong; 6 coins of ₹5

Step-by-Step Solution

Nine ₹5 coins: ≠ 51. With coins of ₹5: → → . Check: 35 + 16 = 51 ✓.
Answer: A) Wrong; 7 coins of ₹5

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