Question

Goddesboi this one! what’s the answer? thanks ^^

Answer 1

Answer:

C) 20.97 AED

Step-by-step 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.