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A bag contains five green marbles and 10 red marble what is the probability of selecting a green marble not replacing it and then the red marble

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Answer:

The required probability is
(5)/(21).

Explanation:

We are given that,

Number of green marbles = 5

Number of red marbles = 10

Thus, total number of marbles = 5 + 10 = 15.

So, the probability of selecting a green marble =
(5)/(15)=(1)/(3)

Now, we are not replacing the green marble and then selecting a red marble.

So, one marble is removed from the total.

Then, the total number of marbles = 14

So, the probability of selecting a red marble =
(10)/(14)=(5)/(7)

Thus, the probability of selecting a green marble and then a red marble =
(1)/(3)* (5)/(7) =
(5)/(21).

Thus, the required probability is
(5)/(21).

User Adam Michalski
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