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Setler [38]
3 years ago
12

What is the probability of selecting two black tiles without replacement in simplest form?

Mathematics
1 answer:
Lelechka [254]3 years ago
3 0
First, note the number of tiles in each color. So there are 6 black tiles and 9 white tiles. 

The probability of picking a black tile the first time is 6/15 which is equal to 

2/5

Now, with black tile gone there are 5 black tiles and 9 white tiles.

The probability of picking a black tile now is

5/14.

But because both picks have to happen, multiply the fractions resulting in 

1/7
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