homework help > math > statistics and probability q&a board > topic: probabilty help...

Q BgQuestion:

      
Scholar
Karma Points: 325
Respect (97%):
posted by  barb321 on 11/4/2009 10:36:55 PM  |  status: Closed  |  Earned Karma: 325

probabilty help

Course Textbook Chapter Problem Needs by
Statistics and Probability N/A N/A N/A 11/5/2009 at 7:00:00 PM
Question Details:

A pool company's records show that the probability is 0.2 that one of its new pools will require repairs within 1 year. What is the probability that the sixth pool built in a given year will be the first one to require repairs within a year
Bonus Point Alert! Earn +9 additional karma points for helping this platinum member.

AAnswers:

Answer Question Ask for clarification
Guru
Karma Points: 2,379
(UNAM MX)
posted by ValdoKan on 11/5/2009 12:28:30 AM  |  status: Live
Asker's Rating: Lifesaver   
Response Details:

=
O'Karma, Where Art Thou?
Novice
Karma Points: 42
posted by Anonymous on 11/5/2009 2:31:08 AM  |  status: Live
Asker's Rating: Helpful   
Response Details:
In this case the probability of pool requiring repair is 0.2 .
Therefore the probabilty that pool does not require repair is 1-0.2 = 0.8
Thus the probability that first five pools wont require repair and the sixth pool will require repair is given by :
  0.8 * 0.8 * 0.8 * 0.8 * 0.8 * 0.2 = 0.065536 =ANS
Sak
Answer Question Ask for clarificarion
Ask New Question

Join Cramster's Community

Cramster.com brings together students, educators and subject enthusiasts in an online study community. With around-the-clock expert help and a community of over 100,000 knowledgeable members, you can find the help you need, whenever you need it. Join for free today » How Cramster is different from tutoring »

Need Help In

Useful Links