SOLUTION: The phone system within a school assigns 4-digit phone numbers.
If the phone numbers are randomly assigned, what is the probability that you will be assigned a phone number that e
Algebra.Com
Question 453825: The phone system within a school assigns 4-digit phone numbers.
If the phone numbers are randomly assigned, what is the probability that you will be assigned a phone number that ends in 0, if the digits may repeat.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The phone system within a school assigns 4-digit phone numbers.
If the phone numbers are randomly assigned, what is the probability that you will be assigned a phone number that ends in 0, if the digits may repeat.
-----
Ways to pick each of the first three digits: 10
Ways to pick the 4 digit: 1
----
# of phone numbers ending in zero: 10^3*1 = 1000
---
Total # of possible phone numbers: 10^4
---------------------
P(phone number ending in 0) = 1000/10,000 = 1/10
====================================================
Cheers,
Stan H
RELATED QUESTIONS
The Phone Number Problem:My office phone is 270-809-6219.If the first number of the phone (answered by swincher4391)
A survey asked people how many phone numbers they have stored in their cell phone. The... (answered by stanbon)
A few years ago Portland instituted a new area code of 971 so that more phone numbers... (answered by stanbon)
How many 7 digit phone numbers are avaliable if the first three digitd sre either 345,... (answered by Fombitz)
How many seven-digit phone numbers are possible if the first two digits cannot be zero or (answered by oberobic,richard1234)
A telephone company wants to create as
many 7-digit phone numbers as possible
without... (answered by nyc_function,sudhanshu_kmr)
How many phone numbers are there with the code... (answered by jim_thompson5910)
how many 7 digit phone numbers are possible if consecutive digits must be different?... (answered by richard1234)
Assuming that all numbers in a phone book are randomly selected. What would you expect... (answered by Edwin McCravy)