Question

A standard number cube that is labeled 1 through 6 is rolled 150 times. What is a reasonable prediction for the number of times it will land on a 3 or a 4?

Answer 1

100 times

Explanation:

Mathematically, the probability of getting a 3 or 4 is the probability of getting a 3 + probability of getting a 4

Probability of getting a 3 = number of 3/total number = 1/6

Probability of getting a 4 = number of 4/total number = 1/6

Thus, the probability of getting a 3 or 4 is 1/6 + 1/6 = 2/3

So the number of times will be probability multiply by number of rolls

= 2/3 * 150 = 100 times