Asked by ariana

a lock has a code of 5 numbers between 1 and 20 . If no numbers in the code are allowed to repeat, how many different codes could be made?

Thank you

5 years ago

Answered by R_scott

20C5

5 years ago

Answered by oobleck

20 * 19 * 18 * 17 * 16

5 years ago

Answered by R_scott

oobleck is correct

its a code ... so the same numbers can be used in a different order

5 years ago

Answered by ariana

so ....15,504?

5 years ago

Answered by ariana

what do i do with these?
20 * 19 * 18 * 17 * 16

5 years ago

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