The random variable X is the amount a person wins, in dollars, after purchasing a single raffle ticket.Below is the probability distribution for X.

x. 0 250 1000

P(X = x) 0.88 0.07 0.05

Find the expected value of the random variable X.

E(X) =

Blank 1. Calculate the answer by read surrounding text.

DoNOTround the answer.

Find the standard deviation of the random variable X.

s=

Blank 2. Calculate the answer by read surrounding text.

If rounding is required, then round correctly to2 decimal places.