Answer:
B: 5
Explanation:
As you can see, after 12, it decreases by 4, then 2. It gives me an idea that the number you decrease from the other number is divided by 2. Since the difference of 6 and 1 is 5, then that is probably your answer!
Answer:
-1
Explanation:
Find components of the definition.

Plug in components

Simplify.
-1
By the way, you are going to get banned if you spam the same question over and over if it's been answered already.
The probability that the the sample mean would be less than x=132.25 will be calculated as follows:
z=(x-σ)/μ
μ- mean
σ- standard deviation
z=(132.25-138)/28=-0.2054
thus:
P(X≤x)=0.4207=42.07%