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?

so it is not 20C5

so can you tell me exactly what the answer is?
I can try to figure out the other 9 questions from this..please
blended learning is bad
my parent don´t know either

thanks
Answered by Reiny
20C5 would be the answer if the order in the codes doesn't matter, but
surely the order does matter, so it must be
20P5
or 20*19*18*17*16 = 1860480
Answered by ariana
THANK YOU!!!!LOVE U~~
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