Chris has a job selling newspapers every morning. He received a base pay of $7.45 a day and also gets 15 cents for every paper h
e sells. One morning he made $16.45. How many papers did he sell?
1 answer:
You might be interested in
Answer:
Step-by-step explanation:
X no of questions student answers is binomial with n =40 and p =0.5
If approximated to normal, X is Normal with
mean = np = 20 and variance = npq = 10
P(X>N) >0.10
We use std normal distribution table to get z value first then convert to x value
So
This is with continuity correction.
Hence without continuity correction this equals 7.2-0.5 = 6.7
x>6.7
n = 7