Which of the following represents the profit from the investment of x dollars at n percent compound annual interest for 4 years?
Choose the correct choice:
A) x (1+n/100)^5 - x B) x (1+n/100)^4 - x C) 3x (1+n/100)^4 - x D) x (1+n/100)^6 - x E) 2x (1+n/100)^4 - x
Amount after 4 years compounded yearly = x (1+n/100)^4   Thus profit = Final amount - original principle = x (1+n/100)^4 - x . Answer : x (1+n/100)^4 - x
<result>B</result>
Which of the following represents the profit from the investment of x dollars at n percent compound annual interest for 4 years?