If joe has $5,600 today and invests it for 12 years at a 10 percent interest rate, how much will he have in 12 years?

I assume the current practice of compound interest rates.  But since the compounding period is not specified, I assume it to be annual.

If the above assumptions are correct, then
Future value = present value *(1+r)^n
=5600(1+0.1)^12
=$17575.20

If the assumptions are incorrect, please comment.

Step-by-step explanation:

Let a be the total score of Div. A

Let b be the total score of Div. B

given,

as equation 1.

and

as equation 2.

Now multiply equation 2 by 1/20 to eliminate b to solve for a.

take this new equation as equation 3.

now we will use equation 1 + equation 3 to eliminate b to solve for a.

Div.A total score = 600

Average Score = Total Score / Number of students.