Question

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?

Answer 1

no ... the earlier posting was corrected

Answer 2

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

Answer 3

i got it!