Musa borrows N10.00 at 2% per month simple interest and repays N8.00 after 4 months. How much does he still owe

A.
N10.80 
B.
N10.67 
C.
N2.80 
D.
N2.67
Correct Answer: Option C
Explanation
I = (frac{PRT}{100})
= (frac{10 times 2 times 4}{100})
= (frac{4}{5})
= 0.8
Total amount = N10.80
He pays N8.00
Remainder = 10.80 – 8.00
= N2.80