A bag has five red marbles, six blue marbles, and four black marbles. What is the probability of picking a blue marble, replacing it, and then picking another blue marble?
A. 1/15
B. 8/75
C. 4/25
D. 1/9
The total number of marbles is 15. The probability of picking a blue marble is 6/15. After putting the marble back, the probability of picking another blue marble is probably 1/9.
Answer: the probability of picking two blue marbles in a row is 1/9.
