An certain brand of upright freezer is available in three different rated capacities: 16 ft3, 18 ft3, and 20 ft3. let x = the rated capacity of a freezer of this brand sold at a certain store. suppose that x has the following pmf.

x 16 18 20
p(x) 0.3 0.1 0.6

(a) compute e(x), e(x2), and v(x).
(b) if the price of a freezer having capacity x is 60x − 650, what is the expected price paid by the next customer to buy a freezer?

The expected price paid by the next customer to buy a freezer is $466

Step-by-step explanation:

From the information given we know the probability mass function (pmf) of random variable X.

Point a:

Therefore

So and

Therefore

Point b:

We know that the price of a freezer having capacity X is 60X − 650, to find the expected price paid by the next customer to buy a freezer you need to:

From the rules of expected value this proposition is true:

We have a = 60, b = -650, and E(X) = 18.6. Therefore

The expected price paid by the next customer is

i think the answer is b.

step-by-step explanation:

not 100% sure though.

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.