SOLUTION: Please help me solve this. Make a prediction based on a theoretical probability. Harriet rolls a number cube 39 times. How many times can she expect to roll 3 or 4?

Algebra ->  Probability-and-statistics -> SOLUTION: Please help me solve this. Make a prediction based on a theoretical probability. Harriet rolls a number cube 39 times. How many times can she expect to roll 3 or 4?      Log On


   

Question 836169: Please help me solve this.
Make a prediction based on a theoretical probability.
Harriet rolls a number cube 39 times. How many times can she expect to roll 3 or 4?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
P(3 or 4) = 1/3, so she expects to roll a 3 or 4 13 times.