Question

he 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 0.139
B 0.22
C 0.25
D 0.9

Answer 1

[AI-generated answer — Bot GPT 3.5]

To calculate the expected probability of selecting a black marble, we need to divide the number of times a black marble was selected by the total number of selections (36).

Number of times black marble was selected: 9
Total number of selections: 36

Expected probability = Number of times black marble was selected / Total number of selections
Expected probability = 9 / 36
Expected probability = 0.25

Therefore, the correct answer is C) 0.25.