I believe it is C when you distribute: 8*x is 8x and 8*2 is 16
Answer:
Average of the draws equals 420
Standard Error = 11.88
Step-by-step explanation:
Given



Solving (a): The average of the draws
This implies that we calculate the sample mean
This is calculated as:
--- Sample Mean = Population Mean
So, we have:

Solving (b): The standard error
This is calculated as:

So, we have:

Using the calculator, we have:

If a is the number of balls Andre hit then a≥2j-20.