Answer:
0.2771
Step-by-step explanation:
This is a binomial probability question. "Makes" is what some writers call a "success." In the binomial probability distribution, the probability of <em>r</em> successes in <em>n</em> trials is

<em>p</em> is the probability of "success." 
In this problem, <em>n</em> = 12, <em>r</em> = 10, <em>p</em> = 0.87 (the 87%).
The probability of exactly 10 made shots out of 12 attempted is

If 4 gal is 25%
and unknown gal is 40%
4x40=160
160/25=6.4
6.4-4=2.4
2.4 is your answer
The answer will be B. Hope it help!
Hey!
Your answer would be 4!
3*4+2=14
Hope this helped! Make sure to check my calculations before submit!
Godspeed
-Song