Annual profit (P) is the product of total annual sales (S) and profit per unit sold (X); that is, Pequals=Xtimes•S. It is desired to know the probability distribution of the random variable P when X and S have the following assumed probability mass functions (X and S are independent). What are the mean, variance, and standard deviation of the probability distribution for annual profit, P?

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the answer is (-8,-5)

step-by-step explanation:

the endpoint to midpoint is half the length. the length is (-2,-1) so when you are at the midpoint just add it to it to find your answer -6+(-2)= -8 and -4+(-1)=-5 so (-8,-5)

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %