A bag contains 60 p, 26 p and 10 coins in the ratio 6:9:4, amounting to Rs. 206. Find the number of 10 p coins of each type?
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correct option is
B
720
Let the number of 10p coins be 4x
⇒ Number of 50p and 25p coins are 5x and 9x respectively.
Total amount=206
∴5x×0.5+9x×0.25+4x×0.1=2.5x+2.25x+0.4x=206
⇒5.15x=206 i.e. x=40
Total number of coins =5x+9x+4x=18x=720
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