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In an urn, there are 20 balls of four colors: red, black, yellow and blue. For...

In an urn, there are 20 balls of four colors: red, black, yellow and blue. For each color, there are 5 balls and they are numbered from 1 to 5.

1) If one ball is randomly drawn from the urn, what is the probability that the randomly selected ball is red or blue?

2) If one ball is randomly drawn from the urn, what is the probability that the randomly selected ball is numbered 1 or blue?

Math   Statistics-And-Probability   
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