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. 14.55%
  B. 29.09%
  C. 34.38%
  D. 68.75%

Respuesta :

The yearly interest rate that Noel payed is 29.09%

Solution:

Cost price of Dishwasher bought by Noel Divine = $ 320

Down payment = $ 20

Amount given in one installment= $ 34

Total Amount paid in 10 Installment = $34 ×10=$ 340

Total amount paid for Dishwasher by Noel Divine = $340 + $ 20 = $ 360

Interest paid by noel = $ 360 - $ 320= $ 40

As the interest will be simple interest

Simple interest =[tex]\frac{Principal \times \text{time} \ \text{rate}}{100}[/tex]

40=[tex]\frac{320 \times R \times \frac{10}{12}}{100}[/tex]

R= [tex]\frac{48000}{3200}[/tex]=15% →→Option A