Can you answer probability question
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Can you answer probability question

[From: ] [author: ] [Date: 12-02-29] [Hit: ]
5 – 0.1 = 0.......
A bag contains 7 red balls numbered 1, 2, 4, 5, 6, 7, 10 -- and -- 3 white balls numbered 3, 8, 9. If a ball is drawn at random, what is the probability the ball is:
a) red or odd-numbered?
b) white or even-numbered?

Can you show me the set up and the answer for both questions? Thanks!

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a) 7 red plus 2 odd white so 9 out of 10 = 9/10

b) 3 white plus 4 red even so 7 out of 10 = 7/10

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a) P(R U O) = P(R) + P(O) – P(R ∩ O) = 0.7 + 0.5 – 0.3 = 0.9

b) P(W U E) = P(W) + P(E) – P(W ∩ E) = 0.3 + 0.5 – 0.1 = 0.7
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