Question

You roll a standard number cube 180 times. predict how many times you will roll a 2 or a 3

Answer 1

60 times.

Explanation:

Prob( of rolling a 2) = 1/6

Prob( of rolling a 3) = 1/6

So Prob( 2 or 3) = 1/6 + 1/6 = 1/3,

So the prediction is 1/3 * 180 = 60.