A bag contains Rs 750 in the form of rupee, 50 p, and 25 p coins in the ratio 5:9:4 amounting to Rs 206. Find the number of coins of each type.
Let the number of 50 p , 25 p and 10 p coins be 5x, 9x and 4x respectively
Then, 5x2+9x4+4x10=206
⇒50x+45x+8x=4120
⇒103x=4120
⇒x=40
∴ Number of 50 p coins =(5×40)=200
Number of 25 p coins =(9×40)=360
Number of 10 p coins =(4×40)=160