A sum of money amounts to Rs. 7719.8 at the rate of 10% compounded annually…

Explanation:

Let the principal (sum of money) be P.

Amount after n years with compound interest: P × (1 + R/100)^n

Here Amount = 7719.8, R = 10%, n = 3. So:

7719.8 = P × (1.1)^3

Calculate (1.1)^3:

• 1.1 × 1.1 = 1.21

• 1.21 × 1.1 = 1.331

So 7719.8 = P × 1.331

Therefore P = 7719.8 ÷ 1.331 = 5800

Hence the sum of money is Rs. 5800.