In the notation below, x is the random variable, c is a constant, and v refers to the variance.

which of the following laws of variance is not true?
-v(c) = 0
-v(cx) = c2 v(x)
-v(x + c) = v(x) + c
-none of these choices.

-V(X + c) = V(X) + c

Step-by-step explanation:

Using the propierties of the variance:

Where k is an arbitrary constant. So:

-V(c) = 0 is true.

Where k is an arbitrary constant. Therefore:

-V(cX) = c2 V(X) is true.

Where k is an arbitrary constant. Hence:

-V(X + c) = V(X) + c is not true.

part 1 answer = 8

part 2 answer = 72

step-by-step explanation:

part 1 explanation = add all of the numbers, then divide by how many numbers you have. so, 200/25 = 8.

part 2 explanation = not gonna lie, this is hard to explain, so just google how to do it.