ECONOMICS (CBSE/UGC NET)

ECONOMICS

COMPOUND INTEREST

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
You invested $1, 900 at 4% interest compounded annually for 3 years. How much interest did you earn in 3 years?
A
$2, 372.40
B
$237.24
C
$2, 137.24
D
$3, 197.60
Explanation: 

Detailed explanation-1: -It is calculated by multiplying the first principal amount by one and adding the annual interest rate raised to the number of compound periods subtract one. The total initial amount of your loan is then subtracted from the resulting value. P is principal, I is the interest rate, n is the number of compounding periods.

Detailed explanation-2: -Thus, the compound interest on Rs. 12000 at 5 % p.a. for 3 years will be Rs. 1891.5.

Detailed explanation-3: -Simple Interest Formula Thus, if simple interest is charged at 5% on a $10, 000 loan that is taken out for three years, then the total amount of interest payable by the borrower is calculated as $10, 000 x 0.05 x 3 = $1, 500.

Detailed explanation-4: -Additionally, the Rule of 72 can be applied across all kinds of durations provided the rate of return is compounded annually. If the interest per quarter is 4% (but interest is only compounded annually), then it will take (72 / 4) = 18 quarters or 4.5 years to double the principal.

There is 1 question to complete.