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Answer:
Mean = 30
standard Deviation = 2.74
Step-by-step explanation:
Formula
mean = np
Standard Deviation =
from the question = 40
P = 75% or 0.75
q = 1 - p = 1 - 75% or 1 - 0.75
To find mean
mean = 40 x 0.75
= 30
For Standard Deviation (SD)
Standard Deviation =
=
=
:. Standard Deviation = 2.74
Answer:
Step-by-step explanation:
Start by simplifying the denominator of the fraction. When multiplying exponents of the same base, you can add the exponents. This is also known as the product rule.
["a" is the base, and "x" and "y" are the exponents]
Using this we find...
When dividing exponents of the same base, you can subtract the exponents. This is also knows as the quotient rule.
Using this we find...