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A bag contains 15 marbles. The probability of randomly selecting a green marble is One-third. The probability of randomly selecting a green marble, replacing it, and then randomly selecting a red marble is StartFraction 1 over 15 EndFraction. What is the probability of randomly selecting a red marble?
A 1/45
B 1/5
C 4/15
D 2/5

2 Answers

3 votes

Answer:

To find the probability of two things happening you multiply the individual probabilities together.

So for this you would multiply the probability of picking green by the probability of picking red to equal 1/15

To find the probability of picking red, divide the total probability by the probability of green:

1/15 / 1/3 = 1/5

The answer is 1/5

User Kwesi
by
5.9k points
3 votes

To find the probability of two things happening you multiply the individual probabilities together.

So for this you would multiply the probability of picking green by the probability of picking red to equal 1/15

To find the probability of picking red, divide the total probability by the probability of green:

1/15 / 1/3 = 1/5

The answer is 1/5

User Tri Hoang
by
6.0k points