A numerical pass code is required to open a car door. The pass code is five digits long and uses the

Discussion in 'Calculator Requests' started by math_celebrity, Jan 10, 2021.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    A numerical pass code is required to open a car door. The pass code is five digits long and uses the digits 0-9. Numbers may be repeated in the pass code. How many different pass codes exist?

    0-9 is 10 digits. Since digits can repeat, we use the fundamental rule of counting to get:
    10 * 10 * 10 * 10 * 10 = 100,000 different pass codes
     

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