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In an exactly 8 character long password where capital letters, small letters, and digits (0 to...

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Statistics

In an exactly 8 character long password where capital letters,small letters, and digits (0 to 9) must be used. Regardless of theorder, how many passwords will use exactly 5 ones, 4 twos, and oneZ?

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solutionGiven thatNoof capital letters 26Noof small letters 26Noof digits09 10Total Noof characters 262610 62i Noof passwords will use exactly 5 ones Regardless of the orderex1 11111ex211111The noof possible ways to keep 5 ones in password 8C5 56The noof possible    See Answer
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