Find at least 20 drivers not wearing their seatbelts

Reference no: EM131418344

Seatbelts II

Police estimate that 80% of drivers now wear their seatbelts. They set up a safety roadblock, stopping cars to check for seatbelt use.

a) How many cars do they expect to stop before finding a driver whose seatbelt is not buckled?

b) What's the probability that the first unbelted driver is in the 6th car stopped?

c) What's the probability that the first 10 drivers are all wearing their seatbelts?

d) If they stop 30 cars during the first hour, find the mean and standard deviation of the number of drivers expected to be wearing seatbelts.

e) If they stop 120 cars during this safety check, what's the probability they find at least 20 drivers not wearing their seatbelts?

Reference no: EM131418344

Questions Cloud

What is the probability of each of the given results : Assume each shot is independent of the others. If she shoots 6 arrows, what's the probability of each of the following results?

Safety and healthy work environment : An employee develops carpal tunnel syndrome from her home work station. She has permission from the company, who employs 200 + people, to work from home. She eventually has surgery on both forearms. This would be work related, because she was hired b..

How many would this person need to get right in order : If the test consists of 100 trials, how many would this person need to get right in order to convince you that ESP may actually exist? Explain.

Find the mean and standard deviation of the number : They will test 50 students at the third-grade level. Find the mean and standard deviation of the number who may be deficient in vitamin D.

Find at least 20 drivers not wearing their seatbelts : How many cars do they expect to stop before finding a driver whose seatbelt is not buckled?- What's the probability that the first unbelted driver is in the 6th car stopped?

New human resource manager and the general manager : You are a new human resource manager and The General Manager (GM) calls you into his office the minute you arrive. He shuts the door after saying a quick word of welcome, and begins to tell you about an incident that happened last week that needs ..

The huron-iroquois word kanata which means settlement : Jacques Cartier was an explorer from France who ended up making three trips across the Atlantic between 1534-1542. His first voyage took him to what is now known as Newfoundland and eventually he discovered Prince Edward Island. He gave Canada its na..

Overview of the organization that you are focusing on : Provide an overview of the organization that you are focusing on. Describe the problem facing the organization that's related to diversity

Design a logical and physical topographical layout : Design a logical and physical topographical layout of the planned network through the use of graphical tools in Microsoft Word or Visio, or an open source alternative such as Dia.

User Account

All Pages