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# Probability

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An urn contains 6 red, 5 blue and 3 green marbles. If 2 marbles are picked at random,what is the probability that both are red?

Jul 16, 2022

#1
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Probability = 6/(14) * 5/13

= 3/7 * 5/13

=15/91

Jul 16, 2022
#2
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The total amount of marbles: $$6+5+3=14$$

The probability that your first pick is red: $$\frac{6}{14}$$

The likelihood that the second pick is red: $$\frac{5}{13}$$, remember you already picked a red one!

Multiply them together to get: $$\frac{6}{14}\cdot\frac{5}{13}=\frac{30}{182}$$, and just simplify that yourself to get the answer!

I hope this helped!

Jul 16, 2022