# Help needed setting up a word problem

• Dec 2nd 2009, 07:13 PM
Videodrone
Help needed setting up a word problem
The word problem is as follows:

A company makes stereo components. Defects in their manufacture are independent of one another. Quality control studies show that:

2% of CD players are defective
3% of amplifiers are defective
7% of speakers are defective

A system consists of a CD player, and amplifiers and two speakers. What is the probability that the entire system is not defective? (If events are independents then so are their complements.)

Thanks in advance for the help.
• Dec 2nd 2009, 07:48 PM
mr fantastic
Quote:

Originally Posted by videodrone
the word problem is as follows:

A company makes stereo components. Defects in their manufacture are independent of one another. Quality control studies show that:

2% of cd players are defective
3% of amplifiers are defective
7% of speakers are defective

a system consists of a cd player, and amplifiers and two speakers. What is the probability that the entire system is not defective? (if events are independents then so are their complements.)

thanks in advance for the help.

(0.98)(0.97)(0.93) = ....
• Dec 2nd 2009, 09:41 PM
oswaldo
(0.98)(0.97)(0.93)^2 = ....
• Dec 4th 2009, 03:45 PM
Videodrone
Not sure why I thought it would be more complicated, but thanks for the help (Happy)