Question

In a bag number of 25 p coins, 20 p coins and 10 p coins are in the ratio 3 : 7 : 9 and together worth of rs 61. Find the number of 20 p coins (

Answer 1

let x is 25 p coins, y is 20 p coins and z is 10 p coins.

so 3x:7y:9z is the relationship given.

sum of all the coins is 61.

X + Y + Z = 61;

by solving first equation we get x = 7y/3 and z = 7y/9;

now putting the values of x and z in x+y+z = 61;

we get

7y/3 + y + 7y/9 = 61;

now solving this equation

(21y+9y+7y)/9 = 61;

37 y = 549;