A bag contains 1 rupee, 50 paisa and 25 paisa coins in the ratio 2 : 3 : 4. If the total value of the coins in the bag is Rs. 45, then find the number of 50 paisa coins.

30

                              1Rs.   :   50p   :   25p

No. of coins    ⇒       2      :     3     :     4

Value of coins ⇒       2      :   1.5    :    1     ⇒ 4.5 (total)

ATQ,

⇒ 4.5 R = Rs.45

⇒ 1R = 10

⇒ No. of 50p coins = 3R = 3 × 10 = 30