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. White Red Black Blue Number of Times Selected 8 14 9 5 Based on these results, what is the expected probability of randomly selecting a black marble from the bag in one attempt?
To find the expected probability of randomly selecting a black marble from the bag in one attempt, we can calculate the total number of times black marbles were selected and divide it by the total number of selections.
Total number of black marbles selected = 9
Total number of selections = 36
Probability of selecting a black marble in one attempt = Number of black marbles selected / Total number of selections
= 9 / 36
= 1/4
= 0.25
Therefore, the expected probability of randomly selecting a black marble from the bag in one attempt is 0.25 or 25%.