Question

The probability of rolling a number less than 3 on a number cube is Jennifer rolls a

number cube 60 times.

How many times should Jennifer expect to roll a number less than 3?

A 10

Answer 1

Question:

The probability of rolling a number less than 3 on a number cube is 2/6 . Jennifer rolls a number cube 60 times. How many times should Jennifer expect to roll a number less than 3?

Answer:

The expected value is 20

Explanation:

Given

`n= 60` --- Number of rolls

`p = (2)/(6)` -- probability

Required

Determine the expected value

Expected value (E(x)) is calculated using:

`E(x) = n * p`

Substitute values for n and p

`E(x) = 60 * (2)/(6)`

`E(x) = (120)/(6)`

`E(x) = 20`