3. When 911 dispatches an ambulance to an emergency, the ambulance arrives within 6 minutes 95% of the time. Find the probability that in 10 calls, the ambulance arrives within 6 minutes at most 7 times. 4. In the wild, about 35% of acorns germinate and grow into oak trees. If 50 acorns fall in the forest, how many would we expect to germinate? 5. Approximately 3.4% of Americans are vegetarian. If we ask a random sample of 36 people, what is the probability that exactly 4 of them are vegetarian? 6. Thirteen percent of adults are left-handed. In a group of 25 adults, find the probability of finding at least one lefty. 7. Six percent of American adults are considered millionaires. If 100 randomly selected adults are interviewed, what is the probability that there are 7 or 8 millionaires in the group? 8. About 29% of Americans own a cat. In a randomly selected group of 80 Americans, find the probability that at least 20 own a cat.

3. When 911 dispatches an ambulance to an emergency, the ambulance arrives within 6 minutes 95% of the time. Find the probability that in 10 calls, the ambulance arrives within 6 minutes at most 7 times. 4. In the wild, about 35% of acorns germinate and grow into oak trees. If 50 acorns fall in the forest, how many would we expect to germinate? 5. Approximately 3.4% of Americans are vegetarian. If we ask a random sample of 36 people, what is the probability that exactly 4 of them are vegetarian? 6. Thirteen percent of adults are left-handed. In a group of 25 adults, find the probability of finding at least one lefty. 7. Six percent of American adults are considered millionaires. If 100 randomly selected adults are interviewed, what is the probability that there are 7 or 8 millionaires in the group? 8. About 29% of Americans own a cat. In a randomly selected group of 80 Americans, find the probability that at least 20 own a cat.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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