Answer:
36h+81m
Step-by-step explanation:
9*4h+9*9m=36h+81m
The probabilities of knocking down zero, one, and two pins are

and

, respectively. The total probability of knocking down at most two is thus

, or

.
I could be wrong but i graphed it out and 9 is C , 10 is A , and 11 is C Hopefully it's right
|x| because just Google it if I'm wrong
Since you have parentheses, you will first multiply (q-2)*(r-3) which equals (qr+6). So now its simplified to p(qr+6) which equals pqr+p6.