Which of the following is a valid probability distribution for a discrete random variable? check all that apply. a. 0.21, 0.16, -.08, 0.05, 0.04, 0.03, -0.24, 0.12, 0.21, 0.18, 0.32 b. 0.18, 0.12, 0.03, 0.08, 0.21, 0.04, 0.05, 0.16, 0.13 c. 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1 d. 0.1, 0.2, 0.3, 0.4 e. 1.0i know that they must add up to 1, but i need to know if it can be e.

The correct options are B, D and E.

Step-by-step explanation:

The basic requirement for a valid probability distribution for a discrete random variable are

1. All probability must between 0 and 1.

2. Sum of all the probabilities must be 1.

In option A,

0.21, 0.16, -0.08, 0.05, 0.04, 0.03, -0.24, 0.12, 0.21, 0.18, 0.32

The probability of an event can't be negative. So, option A is incorrect.

In option B,

0.18, 0.12, 0.03, 0.08, 0.21, 0.04, 0.05, 0.16, 0.13

All values lie between 0 and 1. Sum of all probabilities is

Sum of probability is 1. So, option B is correct.

In option C,

0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1

All values lie between 0 and 1. Sum of all probabilities is 1.1, which is more than 1.

So, option C is incorrect.

In option D,

0.1, 0.2, 0.3, 0.4

In option D,

0.1, 0.2, 0.3, 0.4

All values lie between 0 and 1. Sum of all probabilities is 1.

So, option D is correct.

In option E,

1.0

The probability of an event is 1 if it is certain to happen.Sum of all probabilities is 1.

So, option E is correct.

Therefore the correct options are B, D and E.

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.