Question

A sum invested for 3 years compounded at 5%, 10%, and 20% respectively. In 3 years, if the sum amounts to ₹16632, then find the sum:

Options

• ₹11000

• ₹12000

• ₹9000

• ₹15000

Answer 1

₹12000
Explanation :
Let the required sum be P. Then,

`P(1+5/100)(1+10/100)(1+20/100)=16632`

⇒ `Pxx105/100xx110/100xx120/100=16632`

⇒ `P=(16632xx100xx100xx100)/(105xx110xx120)=₹12000`