Julia purchased a car on an installment plan. She made a down payment of $2,550 and then made n monthly payments of $155 each. If Julia paid a total of $9,060 for the car, how many monthly payments did she make?
A. 30
B. 36
C. 42
D. 48
E. 54
The OA is C
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deloitte247
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Down payment = $2,550
Total payment = $9,060
If she made an installment payment of $155 in 1 month, then she would have paid ($9,060 - $2,550 =$6,510) in 'n' months with $155 monthly installment.
If $155 = 1 month
Then $6,510 = 'n' months <cross multiply>
$$\frac{$155n}{$155}=\frac{$6510}{$155}$$
$$n=42$$
Answer = C
Total payment = $9,060
If she made an installment payment of $155 in 1 month, then she would have paid ($9,060 - $2,550 =$6,510) in 'n' months with $155 monthly installment.
If $155 = 1 month
Then $6,510 = 'n' months <cross multiply>
$$\frac{$155n}{$155}=\frac{$6510}{$155}$$
$$n=42$$
Answer = C
