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

Step-by-step explanation:

Given

$n= 60$ --- Number of rolls

$p = \frac{2}{6}$ -- probability

Required

Determine the expected value

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

$E(x) = n * p$

Substitute values for n and p

$E(x) = 60 * \frac{2}{6}$

$E(x) = \frac{120}{6}$

$E(x) = 20$