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MathematicsMathematics
26 May, 20:08

A key code must contain 4 letters and 3 numbers. The letters may be any letter of the alphabet. The numbers should be any number from 0 to 9. How many different key code combinations are there?

A. 456,976,000

B. 292,484,000

C. 6,824,000

D. 17,576,000

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Answers (1)
  1. 26 May, 21:46
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    You can choose any number from 10 possibilities, and the number can be repeated.

    The number possibilities are: 10^3

    Applying the same method the letters possibilities are: 26^4

    By multiplying them the final result is: A. 456,976,000
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Home » Mathematics » A key code must contain 4 letters and 3 numbers. The letters may be any letter of the alphabet. The numbers should be any number from 0 to 9. How many different key code combinations are there? A. 456,976,000 B. 292,484,000 C. 6,824,000 D.
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