The confidence interval would be (0.122, 0.278).
We first find our z-score. We want a 95% confidence interval:
0.95/2 = 0.475
Looking this up in the z-table, (http://www.statisticshowto.com/tables/z-table/) we see the z-score is 1.96.
The formula we will use is:

In this problem, p = 20/100 = 0.2, and n=100:
You are right, they will be making a $27,000 profit.
how i did the math was 5000*25=125000-98,000=27,000
Hello there,
This is a trick question Josh did not have an error. If you have 4x-8x in the numerator that becomes a -4x/2.
So then -4x/2= -2x
Josh was not wrong.
I hope this helped!
Answer:
The correct answer is option C
Step-by-step explanation: