four friends secretly choosing four distnct number

[sanjib]

four friends secretly choosing four distnct number.
What is the probability that all of them would choose the same ny that all of them umber?
what is the probability that all of them choose distinctly?

[sunnyjohn]

how can be solve this question...when we dont know the number of values in base.
ie; what is the range of number from which 4 guys choose their number?

[Stuart@KaplanGMAT]

four friends secretly choosing four distnct number.
What is the probability that all of them would choose the same ny that all of them umber?
what is the probability that all of them choose distinctly?

If they choose 4 distinct numbers, then there's a 0% chance that they'll choose the same numbers and a 100% chance that they'll choose distinct numbers.