If the probability that a student selected at random from a particular college is good at mathematics is $0.6$, then the probability of having exactly two students who are good at mathematics in a group of $8$ students of that college is:

• A
  $\frac{2^6 \times 3^2 \times 7}{5^8}$
• B
  $\frac{2^6 \times 3^2 \times 7}{5^6}$
• C
  $\frac{2^8 \times 3^2 \times 7}{5^6}$
• D
  $\frac{2^8 \times 3^2 \times 7}{5^8}$