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An internet password having 9 entires is chosen having 7 letters followed by 2 digits. Repetion...

An internet password having 9 entires is chosen having 7 letters followed by 2 digits. Repetion is allowed

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

Total entries = 9

First entry can be selected in 26 ways

Second entry can be selected in 26 ways

Third entry can be selected in 26 ways

Fourth entry can be selected in 26 ways

Fifth entry can be selected in 26 ways

Sixth entry can be selected in 26 ways

Seventh entry can be selected in 26 ways

Eighth entry can be selected in 10 ways

Ninth entry can be selected in 10 ways

So,

Total number of passwords = 267 X 102 = 803,181,017,600

So,

Answer is:

803,181,017,600

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