Platforms
The access code for a car’s security system consists of four digits, 0 through 9. Once a digit is used, it cannot be repeated.There are choices for the first digit,
choices for the second digit,
choices for the third digit, and
choices for the fourth digit.
If the digits 0 through 9 could be repeated, how many access codes would be possible?
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Standard Deviation
Introduction to Normal Distributions