Sally rolled a 6-sided number cube 40 times and it landed on 4 eight times. What is the experimental probability of Sally getting a 4?

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

Solve for n? [tex]z = \frac{3}{4} mn[/tex]

Me i'm timed ! a. -2 to 1 b. -1.5 to 0.5c. 0 to 1d. 0.5 to 1.5