Question
A bag contains certain number of coins of different
denominations. The ratio of the number of Rs. 5 coins to Rs. 10 coins is 7 : 9, respectively and the ratio of number of Rs. 10 coins to Rs. 20 coins is 9 : 11 respectively. Find the total value of the Rs. 20 coins, if the total value of the Rs. 5 coins in the bag is Rs. 350.Solution
Given: Ratio of Rs. 5 coins to Rs. 10 coins = 7:9 Ratio of Rs. 10 coins to Rs. 20 coins = 9:11 Total value of Rs. 5 coins = Rs. 350 Let the number of coins be: Rs. 5 coins = 5x Rs. 10 coins = 9x Rs. 20 coins = y From the ratio of Rs. 10 to Rs. 20 coins: y=11x Total value of Rs. 5 coins: 5×5x=350 25x=350 x=14 Find number of Rs. 20 coins: y=11x=11×14=154 Total value of Rs. 20 coins: Total value=20×154=3080
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