My Math Forum Multiple Choice Probability Problem!

 Algebra Pre-Algebra and Basic Algebra Math Forum

 April 19th, 2009, 11:23 AM #1 Newbie   Joined: Apr 2009 Posts: 5 Thanks: 0 Multiple Choice Probability Problem! This is the most confusing chapter out of all the chapters. I really appreciate it if you can help me through these problems. Thank you so much.
 April 19th, 2009, 11:33 AM #2 Senior Member   Joined: Oct 2007 From: Chicago Posts: 1,701 Thanks: 3 Re: Multiple Choice Probability Problem! Mutually exclusive: The events cannot happen at the same time. Complementary: The events are mutually exclusive and one of them will [i[/always[/i] happen. For number 9, they are mutually exclusive, because your roll cannot simultaneously be greater than and less than 2. Are they complementary? Is rolling a 2 included in the union of the events? (I'm giving you hints to solve it) Try working out this and the others, and show us what progress you can make, and we can try to be more specific.
 April 19th, 2009, 11:45 AM #3 Newbie   Joined: Apr 2009 Posts: 5 Thanks: 0 Re: Multiple Choice Probability Problem! thanks for the help. So for 10) would it be complementary because the event can happen. 11) im stuck 12) mutually exclusive
April 19th, 2009, 12:55 PM   #4
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Re: Multiple Choice Probability Problem!

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 Originally Posted by krzyrice thanks for the help. So for 10) would it be complementary because the event can happen. 11) im stuck 12) mutually exclusive
For 10: Complementary means one or the other must happen, but not both. Since getting 4 or 5 is true for both, it is not complementary. So the correct answer is (c).

For 11: 4 is included for both so you have (c) as the correct answer.

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