A piggy bank contains coins of denominations ₹2, ₹5 and ₹10.The number of 5 rupee coins os two times the number of ₹2 coins. If the total number of coins is 100,find the number of coins of each denomination in the piggy bank.
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Answer:
Let the nuumber of 2 ruppees be x
Then number of 5 ruppees=x+10
Total money=2x+5(x+10)=155
=>2x+5x+50=155
=>7x +50=155
=>7x=105
Therefore x=15
Therefore number of 2 ruppees=15
Therefore number of 5 ruppees=15+10=25
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