Answer:
- The probability that both marbles are blue is 1/25
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Number of marbles:
- Red = 1, blue = 2, yellow = 3, black = 4
Total number:
Probability of getting a blue marble:
- P(blue) = number of blue / total number
- P(blue) = 2/10 = 1/5
Since the second marble is selected with replacement, the probability of the second blue marble is same, so the probability of two blue marbles is:
- P(blue, blue) = 1/5*1/5 = 1/25
