Person A,B

Person A takes 3000 USD from person B for 2 yrs at the rate of 10% half yearly interest. What amount will be paid by person A to B after the end 2 yr?

Correct answer:

x =  4200 USD

Step-by-step explanation:

$$\begin{gathered} r=10\%=\frac{10}{100}=\frac{1}{10}=0.1 \\ a=3000\text{USD} \\ i=a\cdot r=3000\cdot 0.1=300\text{USD} \\ n=2\cdot 2=4 \\ x=a+n\cdot i=3000+4\cdot 300=4200\text{USD} \end{gathered}$$

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