The urn contains 5 red, 7 blue and 11 white balls. What is the probability that a ball that is taken out is not white?

1) First, find the total number of outcomes.

5 + 7 + 11 = 23.

2) Event A – an event that favors the condition.

You need to find the number of outcomes, where the removed ball is not white.

5 + 7 = 12.

3) Let’s find the probability that the taken ball is not white.

P (A) = 12/23 = 0.522.

Answer: P (A) = 0.522.




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