bag contains 4 white, 3 blue, and 3 red marbles. Find the probability of choosing a red marble, then a white marble if the marbles are replaced. 7/10, 7/100, 12/90, 12/100

1 answer

The probability of choosing a red marble first is 3/10.

Since the marbles are replaced, after choosing a red marble the total number of marbles remains 10. Now, there are 4 white marbles left, so the probability of choosing a white marble next is 4/10.

Therefore, the probability of choosing a red marble first and then a white marble is:
(3/10) * (4/10) = 12/100 = 3/25 = 0.12 = 12%