1. A bag contains different types of old coins in the ratio 11:13:12 whose values are 3 rupees, 4 rupees and 5 rupees respectively. If the total value of the coins is Rs.725, find the number of coins of 3 rupees coin.
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By: anil on 05 May 2019 01.13 am
Let number of 3 rupees, 4 rupees and 5 rupees respectively be $$11x,13x$$ and $$12x$$ Total amount = $$(3 imes11x)+(4 imes13x)+(5 imes12x)=725$$ => $$33x+52x+60x=725$$ => $$x=frac{725}{145}=5$$ $$ herefore$$ Number of 3 rupees coins = $$11 imes5=55$$ => Ans - (B)
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