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 is the answer
of 20C5
then 15,504?
Answered by R_scott
no ... the earlier posting was corrected
Answered by ariana
Scott, please just explain in baby words..(give me this answer) and I can figure out the other 9 questions.
This blended school learning is not for me....
thanks a million
my parents have no clue either
really stuck



Answered by ariana
i got it!
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