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There is a bag filled with 4 blue, 3 red and 5 green marbles. A marble is taken at random from the bag, the colour is noted and then it is replaced. Another marble is taken at random. What is the probability
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12 votes
12 votes
There is a bag filled with 4 blue, 3 red and 5 green marbles.

A marble is taken at random from the bag, the colour is noted and then it is replaced.
Another marble is taken at random.
What is the probability of getting 2 greens?

User Kudit
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1 Answer

13 votes
13 votes


|\Omega|=12^2=144\\|A|=5^2=25\\\\P(A)=(25)/(144)\approx17.4\%

User Localshred
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