Posted by **robyn** on Saturday, July 25, 2009 at 6:22pm.

Imagine that you have 10 CDs and 10 envelopes on a table before you; each CD and each envelope are labelled with a number such as 7 or 10. If you randomly put the CDs into the envelopes provided, what is the probability of matching only one CD into the wrong envelope?

- stastics -
**economyst**, Sunday, July 26, 2009 at 8:51pm
It took me a few minutes to realize this is a trick question. It is impossible to have exactly one CD in the wrong envelope. If a CD is in the wrong envelope, then there must be at least one other CD in a wrong envelope. So, the probability is zero.

## Answer this Question

## Related Questions

- Probability/Statistics - A secretary addresses 50 different letters and ...
- 5th grade math - mrs jones wrote 8 personal letters and addressed 8 envelopes to...
- math - A company wants to send out a mailer. A mailer be sent only if it has an ...
- math..probabilities - You type four letters to four different people and address...
- math..probabilities - You type four letters to four different people and address...
- math - You type four letters to four different people and address the envelopes...
- math - You type four letters to four different people and address the envelopes...
- Math - Find the number of each kind of object in the collection Miranda has 24 ...
- Algebra - Joel has twice as many CDs as Mariella has. subtracting seven from ...
- multi step equations - Joel has twice as many cds as Mary has. Subtracting 7 ...

More Related Questions