Question

Lesson 6.1.2: Probability Rules the salesman knows that you can give him epod advice. He has given you all of his data. He asks you which homeowners you think are most likely to purchase insulation. Compare the homeowners who would purchase insulation using probability. After doing the conditional probabilities what would you tell him? 2 Even though many people are afraid of rattlesnakes, adult rattlesnakes tend to hide rather than bite humans. But they do sometimes bite. Hospitals keep medical records of rattlesnake bites. These records show that about 30% of the rattlesnake bites contain no venom. These non-venomous bites are known as dry bites. In the questions below, consider each rattlesnake bite as an independent event. A What is the probability that two rattlesnake victims get dry bites? B If you are bitten by a rattlesnake, what is the probability the bite contains venom? C An emergency center in West Texas sees six patients with rattlesnake bites during the fall rattlesnake round-up. What is the probability that all the bites contain venom? 3 A small college has ten biology instructors, five male and five female. The president of the college must randomly select three biology instructors to work on a curriculum subcommittee. All ten instructors will do a fine job, so random selection is appropriate. If three instructors are randomly selected, what is the probability that the president will select three female instructors? Is this likely? "Barton D. Schmitt, MD, "Snakebites," Children's Health Network, August 13 2009, accessed July 10, 2014 http://www.childrenshealthnetwork.org/CRS/CRS/pa_bitesnak_hhg.htm Statway Version 3.1, 2018 WestEd. All rights reserved. 6.12 | 10

Answer 1

2 a) - 0.7 = Probability of day bite. 2 victims getting dry bites & (0.72 30:49 b) 0 0.3 (0:3)6 = 0.000729 C C CS anned with CamScanner