Question

Please help me with this permutations and combinations math problem​

Answer 1

Answer:

Step-by-step explanation:

$C^n_r=\frac{n!}{(n-r)!r!}\\P^n_r=\frac{n!}{(n-r)!}$

$\frac{(28+70)(30-6)}{(30)^2-6^2}=\frac{49}{18}=2.722222222222222$