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# Probability

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A drawer contains 3 white balls and 6 black balls. Two balls are drawn out of the box at random. What is the probability that they both are black?

Apr 21, 2022

#1
+30
+3

Probabilty oooo

First, the chance of getting 1 black ball.

$$\frac{6}{9}$$ aka $$\frac{2}{3}$$

Then, the chance of getting another one.

$$\frac{5}{8}$$because you already removed one, so total is 8, and 5 black balls left.

You times $$\frac{2}{3}$$by $$\frac{5}{8}$$ and you get $$\frac{10}{24}$$or $$\frac{5}{12}$$

Apr 21, 2022

#1
+30
+3

Probabilty oooo

First, the chance of getting 1 black ball.

$$\frac{6}{9}$$ aka $$\frac{2}{3}$$

Then, the chance of getting another one.

$$\frac{5}{8}$$because you already removed one, so total is 8, and 5 black balls left.

You times $$\frac{2}{3}$$by $$\frac{5}{8}$$ and you get $$\frac{10}{24}$$or $$\frac{5}{12}$$