I need some help in checking my work, especially #4. Problem: You have a set of 10 cards numbered 1-10. You choose a card at random. Event A is choosing a number less than 8. Event B is choosing an even number. Draw a Venn Diagram and calculate each of the following probabilities:(adsbygoogle = window.adsbygoogle || []).push({});

1) P(A) = 77.8%

2) P(B) = 55.6%

3) P(A intersection B) = 33%

4) P(A union B) = 100%

5) P(A complement) = 22.2%

For #4, my calculations were P(A union B) = P(A) + P(B) - P(A and B). Did I calculate something wrong here?

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# Homework Help: Venn diagram and sample space

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