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# Probability

Can anybody help me with this two examples problems. Some of them are giving me a lot of numbers which it should give me a few numbers comparing them to the other results I was manage to do.
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2. Social Security Numbers Each social security number is a sequence of nine digits. What is the probability of randomly generating nine digits and getting your social security number?

Positive Test Results Negative Test Result
Subject is pregnant 80 5
Subject is not pregnant 3 11

1. Assume that one of the subjects is randomly selected. Find the probability that the selected subject is not pregnant, given that the test was negative. I the result the same as the probability of a negative test result given that the selected subject is not pregnant?

#### Solution Preview

I have attached a file with an explanation.
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2. Social Security Numbers Each social security number is a sequence of nine digits. What is the probability of randomly generating nine digits and getting your social security number?

The chances of drawing a single number matching a single your social security number is 1/10 because there are 10 digits you can draw from (0, 1, 2, 3, 4, 5, ...

#### Solution Summary

This solution provides an explanation of two different probability problems.

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