Random Variables

The expected value of a discrete random variable is $E\left(X\right)=4.3$`E`(`X`)=4.3

a

Calculate $2E\left(X\right)$2`E`(`X`).

b

Calculate $E\left(2X\right)$`E`(2`X`).

c

Calculate $E\left(X-1\right)$`E`(`X`−1).

d

Calculate $E\left(4X+1\right)$`E`(4`X`+1).

e

Solve for the value of $n$`n` such that $E\left(nX+3\right)=11.6$`E`(`n``X`+3)=11.6.

Easy

Approx 3 minutes

Sign up to try all questions

Investigate situations that involve elements of chance: A calculating probabilities of independent, combined, and conditional events B calculating and interpreting expected values and standard deviations of discrete random variables C applying distributions such as the Poisson, binomial, and normal

Apply probability distributions in solving problems