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ASAP there are three marbles in a bag. One is red and two are black. What is the probability of picking a black marble first, putting it back in the bag and then picking a black marble? Use the following probability to find the answer.

ASAP there are three marbles in a bag. One is red and two are black. What is the probability-example-1
User Kuporific
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2 Answers

14 votes
14 votes

Answer: Choice D) 4/9

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Step-by-step explanation:

The probability you get a black marble on the first selection is 2/3 since we have 2 black marbles out of 2+1 = 3 total.

We put the marble back and then we have 2/3 as the probability of selecting another black marble on the second try. Nothing has changed because we put the marble back. That means the events are independent.

So we get (2/3)*(2/3) = 4/9 as the probability of selecting 2 black marbles in a row (with replacement).

User Nate Cavanaugh
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2.7k points
19 votes
19 votes

Answer:


(4)/(9)

Step-by-step explanation:


p = (favorable \: outcomes)/(total \: outcomes) = (4)/(9)

User Fwend
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