1.
Answer A.
2.
Answer B.
3.
Answer C.
At the end of the day he has 225 pounds as credited means got paid checks posted also means the money went inside his account
The domain would have to be greater than or equal to 0, assuming x is the number of people attending. You can't have a negative number of people!
Answer:
Option C: 15.87 is the correct answer
Step-by-step explanation:
Given
Mean = $47500
SD = $12500
We have to find the probability of having $60000 or more
So,
x = $60000
The z-score will be:

Looking in the z-score table, we get
P(Z<60000) = 0.8413
In order to find the probability P(Z>60000) => 1-P(Z<60000)
= 1-0.8413
=0.1587
Converting into percentage: 0.1587*100 = 15.87%
Hence,
Option C: 15.87 is the correct answer
In order to determine the number of students surveyed, we will count the number of students in each sub-group.
Students that did not engage: 279
All three behaviours: 90
113 smoked cigrarettes and used illegal drugs: