B is the answer to this question
Answer:
Step-by-step explanation:
c
Answer:
23
Step-by-step explanation:
133 = 18 + 5x
155 = 5x
23 = x
First, find the mean. You'll need it to compute the variance.

The variance of the sample is then computed with the formula

The standard deviation is the square root of the variance, so
you can only choose 4 unique ways Step-by-step explanation: