Saturday

December 20, 2014

December 20, 2014

Posted by **Anna** on Saturday, November 21, 2009 at 12:07pm.

- Probability -
**economyst**, Monday, November 23, 2009 at 9:35amI believe I answered this in an earlier post.

There are 9 possible values for the first digit and 9 for the second, and so on. So, there are 9^8 possible serial numbers, where no digits is a zero. Similarly, there are 8^8 possible values where no digit is a zero or a seven. So, the probability there is at least one seven is:

1- (8^8)/(9^8)

**Answer this Question**

**Related Questions**

Probability - The serial number on a $10 bill contains eight non-zero digits. If...

Math - A box contains a one-dollar bill, a five-dollar bill, a ten-dollar bill, ...

Math - A box contains a one-dollar bill, a five-dollar bill, a ten-dollar bill, ...

business math - What is the probability that a 8-digit phone number contains at ...

Math - A bag has 20 balls numbered from 1 to 20. If you guess the number of the ...

math-probability - A state lottery has a daily drawing to form a four-digit ...

stats - what is the probability that a 6 digit phone number contains at least ...

Probability - 1. You roll a number cube numbered one to six 12 times. P(5)=2/3. ...

does anyone know probability???? - The digits 2, 3, 4, 7, and 8 are each used ...

probability - The digits 2, 3, 4, 7, and 8 are each used once in a random order ...