Question

7. A box contains 5 balls. Two are numbered '7', two are numbered '8', and one ball is numbered '9'.

Create the probability distribution for drawing a ball and writing down the number on the ball.
7
248
19
x
P(X)
7a. What is the expected value for the number on the ball?

Answer 1

7:2 8:2 9:1 3:5

Explanation:

2 7s 2 8s 1 9 3 different numbers 5 different balls