SOLUTION: At the end of 2010, 31% of the households in the Us had a Blu-ray player. If eight households are chosen at random, find the probability that a.Exactly five of them have a Blu-ray

Question 792386: At the end of 2010, 31% of the households in the Us had a Blu-ray player. If eight households are chosen at random, find the probability that
a.Exactly five of them have a Blu-ray.
b. At least five of them have a Blu-ray player.
c. At most four of them have a Blu-ray player.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
At the end of 2010, 31% of the households in the Us had a Blu-ray player. If eight households are chosen at random,
-------
Binomial Problem with n = 8 and p(have) = 0.31
----------
find the probability that
a.Exactly five of them have a Blu-ray.
P(x = 5) = 8C5(0.31)^5*(0.69)^3 = binompdf(8,0.31,5) = 0.0527
--------------------------------------------
b. At least five of them have a Blu-ray player.
P(5<= x <=8) = 1 - P(0<= x <=4) = 1 - binomcdf(8,0.31,4) = 0.0661
--------------------------------------------
c. At most four of them have a Blu-ray player.
Ans: 1-binomcdf(8,0.31,3) = 0.2126
======================================
Cheers,
Stan H.
=============

RELATED QUESTIONS
There are approimately 98.8 million households in the United States. If a households is... (answered by Edwin McCravy)

Cable Television In 2006, 86% of U.S. households had cable TV. Choose 3 households at... (answered by edjones)

In 2006, 86% of U.S. households had cable TV. Choose 3 households at random. Find the... (answered by ikleyn)

The cable TV industry reports that 59% of homes in the US to cable TV. If you pick four... (answered by stanbon)

Eighty one percent of U.S. households have DVD players. Choose 6 households at random.... (answered by stanbon)

Cable Television In 2006, 86%of U.S. households had cable TV. Choose 3 households at... (answered by robertb)

In a particular suburb, 30% of the households have installed electronic security systems. (answered by stanbon)

. In a particular suburb, 50% of the households have installed electronic security... (answered by stanbon)

During a clearance sale,an electronic store sold a Blu-ray player for $340. If items on... (answered by stanbon,Alan3354)