SOLUTION: Three samples are taken simultaneously from a process that is know to produce 20% defects. What is the probability that all three samples will be good.

Question 895363: Three samples are taken simultaneously from a process that is know to produce 20% defects. What is the probability that all three samples will be good.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Three samples are taken simultaneously from a process that is know to produce 20% defects. What is the probability that all three samples will be good.
-----
Note 20 out of 100 are defective.
Therefore 80 out of 100 are good.
-------------------------
# of ways to succeed:: 80C3
# of random triples:: 10C3
----
P(3 good) = 80C3/100C3 = 0.5081
-------------------------
Cheers,
Stan H.
--------------------
RELATED QUESTIONS
A new process or constructing I-pods is said to produce defects in only 5% of units... (answered by ewatrrr)

a quality control engineer inspects a random sample of three batteries from a lot of 30... (answered by ewatrrr)

Using the poisson distribution cloth is woven continously in a textile mill and from... (answered by Boreal)

A quality control engineer inspects a random sample of three batteries from each lot of... (answered by ikleyn)

a)A quality control engineer inspects a random sample of three batteries from a lot of 30 (answered by ewatrrr,ikleyn)

the probability that a bullet fired from a point will hit the target is 1/3. Three such... (answered by Theo,ikleyn)

a quality control engineer inspects a random sample of three batteries from a lot of 30... (answered by ewatrrr,ikleyn)

A production process is known to produce 10% defectives. A buyer purchases 30 of these... (answered by Boreal)

1. Consider the data set: 27, 24, 20, 15, 30, 34, 28, 25. The 25th percentile is a. 20... (answered by stanbon)