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Claude has 2 jars of marbles. Each jar has 10 blue marbles and 10 green marbles. He selects 2 marbles from each jar. What is the probability that they are all blue ? ( Enter answers as fractions when possible and the final answer rounded to the nearest thousandth, please )

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mxlissa
Wouldn't it be 10/20 or 1/2? 0.5 in decimal form
Riia

It is given in the question that

Claude has 2 jars of marbles. Each jar has 10 blue marbles and 10 green marbles. He selects 2 marbles from each jar.

Selecting 2 blue marbles out of 10 blue marbles is

[tex]10C 2 = 45[/tex]

And selecting 2 marbles out of 20 marbles is

[tex]20C2 =190[/tex]

Therefore probability of selecting 2 blue marble each from the two jars is

[tex]\frac{45}{190}*2 = 0.474[/tex]

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