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?
Responses
A 0.1390.139
B 0.220.22
C 0.250.25
D 0.9
The total number of marbles selected is 36, and black marbles were selected 9 times.
Therefore, the expected probability of randomly selecting a black marble is:
9 (number of times black was selected) / 36 (total number of selections) = 0.25
So, the answer is C) 0.25.