Question

Goddesboi

this one!



what’s the answer?


thanks ^^

Answer 1

C) 20.97 AED

Explanation:

To find the expected value, E(X), or mean μ of a discrete random variable X, simply multiply each value of the random variable by its probability and add the products. The formula is given as
`\displaystyle E(X)=\mu=\sum xP(x)`.

Here, x represents values of the random variable X,
`P(x)` represents the corresponding probability, and symbol
`\displaystyle \sum` represents the sum of all products
`xP(x)`. Here we use the symbol
`\mu` for the mean because it is a parameter. It represents the mean of a population.

In this case, the expected value of the ticket is
`\displaystyle E(X)=\mu=\sum xP(x)=12(0.08)+18(0.15)+20(0.31)+22(0.08)+24(0.15)+25(0.23)=20.97`

This means that Ahmad can expect to win 20.97 AED for the ticket.