1. If you rolled a number cube 900 times, predict how many times you would roll a 2 or 5. Explain your answer.

Question

how many times would you roll a 2 or a 5

Answer 1

Probability of rolling a 2 or 5 on one role is 2/6=1/3

Use expected value = n * p where n is the number of roles and p is the probability (p=1/3 in this case)