exclusivitojr3339 exclusivitojr3339
  • 04-01-2018
  • Mathematics
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How many 5 digit numbers are there with distinct digits?

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dragonslasher
dragonslasher dragonslasher
  • 04-01-2018
For the third digit you can use any of the 8 digits not already used.

For the next digit, there are 7 choices.

And for the final digit there are 6 choices left.

Multiplying the values together gives the stated answer: 9 x 9 x 8 x 7 x 6.
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