Noel Devine bought a new dishwasher for $320. He paid $20 down and made 10 monthly payments of $34. What actual yearly interest rate did Noel pay? A. 29.09% B. 68.75% C. 34.38% D. 14.55%

Here the correct answer is D) 14.55%.

Explanation:

Given information -

Dishwasher amounts to - $320

Down payment - $20

Monthly payment of - $34 for 10 months

Interest rate - ?

With the given information we can calculate the amount of interest paid by Noel Devine -

Total amount paid - Dishwasher amount

= $20 + 10 x $34 - $320

= $360 - $320

= $40

Rate of interest (r) = i x 100 / p x n

where i = $40, n = 10 months (when taken in year it will be 10 / 12)

p (principal) = $320

= $40 x 100 / (10/12 x $320)

= $4000 / $266.666667

= $4000 / $266 2/3 (multiplying by 100 to take out percentage)

= 14.55%

=