The rules of a contest say that there is a 6% chance of winning a prize. Four hundred people enter the contest.
How many people will win a prize?

66

Step-by-step explanation:

Note that the first function is f(x) = 4 for x less than 2  and for the second function f(x) = -1 for x greater than or equal to 2  

So the limit as x approaches two from the left is 4 and the limit as x approaches 2 from the right is -1.

so looks like you would need the third choice:  4; -1