Homework Help: math

Posted by joe on Saturday, April 17, 2010 at 5:00pm.

How do you do this question?
A shipment of 25 television sets contains three defective units. In how many ways can a vending company purchase four of these units and receive (a) all good units, (b) two good units, and (c) at least two good units.

math - bobpursley, Saturday, April 17, 2010 at 5:57pm
ways to get 4 good units: 1 (good, good, good, good)

ways to get two good:
GGBB
GBBG
GBGB
BBGG
BGBG
BGGB

ways to get at least two good:
above ways, plus
GGGG
PLus
GGGB
GBGG
GGBG
BGGG

Answer this Question

Related Questions

statistic - a shipment of 40 television sets contains 3 defective units. How ...
statistics - Suppose a shipment of 500 machine parts contains 62 defective and ...
stats - Suppose a shipment of 500 machine parts contains 62 defective and 438 ...
Probability - CHECK - Could someone check my answers for these questions: 62. ...
math - the probability of a computer memory chip being defective is 0.02. which ...
precalculus - a shipment of 10 microwaves contains 3 defective units. in how ...
statistics 221 - A shipment of 35 computers contains three that are defective. ...
EEE - the solve of the shipment of 10 items has 2 items defective and 8 items ...
finite math - a box contains 40 computer disks, 5 are defective. Three disks are...
Math - Statistics - A company claims that no more than 5% of a particular ...

For Further Reading

First Name:
School Subject:
Answer: