Given: Re. 1, Rs. 5, and Rs. 10 Coins are in the ratio 3 : 5 : 7 Total value of coins in the box is Rs. 294. Calculation: Let the number of coins of Rs. 1, 5 and 10 rupees be 3x, 5x, and 7x respectively Total value of coins = (3x × 1) + (5x × 5) + (7x × 10) ⇒ 3x + 25x + 70x = 98x ⇒ 98x = 294 ⇒x=
294
98
=3 ⇒ Total value of coins of Rs. 10 = 3 × 70 = Rs. 210 ∴ Total number of coins =