Purchase Solution

# Probability : Counting Principle

Not what you're looking for?

A social security number has 9 digits. How many different S.S numbers are possible if:

a. repetition of digits is permitted
b. repetition of digits is not permitted
c. the first digit cannot be a 0 and repetition is not permitted

I need the layout (counting principle)
ex. 9 8 7 - 6 5 - 2 1 4 3
- - - - - - - - -
Thankyou

I think the answer for a= 1,000,000,000
for b= 3,628, 800 and for c= 3,265,920
Let me know!

##### Solution Summary

Counting problems are solved and explained.

##### Solution Preview

It's a counting problem. Follow the condition carefully and you won't miss it.

Please see the attached file for the complete solution.
Thanks for using BrainMass.

A social security number has 9 digits. How many different S.S numbers are possible if:

a. repetition of digits is permitted
b. repetition of digits is not permitted
c. the first digit cannot be a 0 and repetition is not permitted

I need the layout(counting principle)
ex. 9 8 7 - 6 5 - 2 1 4 3
- - - - - - - - -
Thankyou

I think the answer for a= 1,000,000,000
for b= 3,628, 800 and for c= ...

##### Exponential Expressions

In this quiz, you will have a chance to practice basic terminology of exponential expressions and how to evaluate them.

##### Probability Quiz

Some questions on probability

##### Graphs and Functions

This quiz helps you easily identify a function and test your understanding of ranges, domains , function inverses and transformations.

##### Multiplying Complex Numbers

This is a short quiz to check your understanding of multiplication of complex numbers in rectangular form.