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Question

A PURSE CONTAINS SOME 25p COINS AND SOME 50p COINS. THE TOTAL AMOUNT IN THE PURSE IS RS 25. IF THE NUMBER OF 50p COINS IS DOUBLE THE NUMBER OF25p COINS, HOW MANY OF EACH COINS IS THERE IN THE PURSE.

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Solution

Let the number of 25 - paise coins = xThen the number of 50-paise coins = 2xNow, value of 25-paise coins = Rs 0.25xValue of 50-paise coins = Rs 0.50×2x = Rs xNow, according to question :0.25x + x = 251.25x = 25x = 251.25x = 2500125x = 20So, the number of 25 - paise coins = x = 20number of 50-paise coins = 2x = 2×20 = 40

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