1 / 6

# Additional Probability Problems - PowerPoint PPT Presentation

Additional Probability Problems. 1) The American Red Cross says that about 45% of the U.S. population has Type O blood, 40% Type A, 11% Type B, and the rest type AB. Someone volunteers to give blood, what is the probability that this donor has Type AB blood? has Type A or Type B?

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

1) The American Red Cross says that about 45% of the U.S. population has Type O blood, 40% Type A, 11% Type B, and the rest type AB.

• Someone volunteers to give blood, what is the probability that this donor
• has Type AB blood?
• has Type A or Type B?
• has the complement of Type O?

4%

51%

55%

2) The American Red Cross says that about 45% of the U.S. population has Type O blood, 40% Type A, 11% Type B, and the rest type AB.

• Among four potential donors, what is the probability that
• all are Type O?
• no one is Type AB?
• at least one is Type B?
• d) they are not all Type A?

0.041

0.849

0.373

0.974

3) A consumer organization estimates that over a 1-year period 17% of cars will need to be repaired only once, another 7% need repairs twice, and another 4% will require three or more repairs.

• If you own two cars, what is the probability that
• neither will need repair?
• both will need repair?

.5184

.0784

4) A slot machine has three wheels that spin independently. Each has 10 equally likely symbols: 4 bars, 3 lemons, 2 cherries, and a bell. If you play, what is the probability

• you get 3 lemons?
• you get no fruit symbols?
• you get 3 bells (the jackpot)?
• you get no bells?
• e) you get at least one bar (automatically lose)?

.027

.125

.001

.729

.784

5) Suppose the police operate a sobriety checkpoint after 9 p.m. on a Saturday night when national traffic experts suspect about 12% of drivers have been drinking. Trained officers can correctly decide if a person has been drinking 80% of the time. What’s the probability that

• any given driver will be detained for drunk driving?
• a driver who was detained has actually been drinking?
• c) a driver who was released had actually been drinking?

.272

.353

.033