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.

to find the unit price, we must figure out the cost of one item (in this case one dish towel).   to do this, we divide the total price ($7.92) by the number of items bought (for this problem it is 8, because there are eight dish towels in one pack).  

$7.92/8 = $0.99

therefore, the unit price, or the price of one dish towel, is $0.99.

hope this !

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer