The total number of marbles selected is 36. The number of black marbles selected is 9.
Therefore, the expected probability of randomly selecting a black marble from the bag in one attempt is:
9/36 = 1/4 = 0.25
So, the expected probability is 0.25 or 25%.
The table shows the results of randomly selecting colored marbles from a bag 36 times. The marble was returned to the bag after each selection.
8 white 14 red 9black 5 blue
Based on these results, what is the expected probability of randomly selecting a black marble from the bag in one attempt?
1 answer