Asked by Robert
If every seven digit whole neumber is a possible phone number, except those that begin with 0 or 1, what fraction of telephone numbers begin with 9 and end with 0?
Answers
Answered by
bobpursley
wouldn't it be 1/8 * 1/10 ?
Answered by
PsyDAG
Since the first number cannot be 0 or 1, you have 1/8 probability of getting a 9. The probability of the last number being 0 is 1/10.
The probability of two or more events all occurring is found by multiplying the individual probabilities.
I hope this helps you to understand the process to solve similar problems. Thanks for asking.
The probability of two or more events all occurring is found by multiplying the individual probabilities.
I hope this helps you to understand the process to solve similar problems. Thanks for asking.