how many 4 digit combinations are possible no my cell phone when there are 12 characters and what is the equation to solve this?
2007-03-10 04:48:15 · 3 answers · asked by Daniel C 2 in Science & Mathematics ➔ Mathematics
it is a 4 # code with 0-9 and # and * also... i know with 0-9 there would be 9999 combinations but how many combinations when u include the extra 2 characters?
2007-03-10 04:57:23 · update #1
12*12*12*12=20736
b coz for each place there r 12 possibilities for filling the numbers
2007-03-10 05:03:04 · answer #1 · answered by miinii 3 · 0⤊ 0⤋
You'll have to explain this a bit better. First of all, a digit is a number from 0 to 9. So there can't be 12 possible digits. Are the characters somewhere else?
2007-03-10 12:52:41 · answer #2 · answered by Gnomon 6 · 0⤊ 0⤋
there is formulla
no. of combination=n C r=n!/(r!)(n-r)!
for this problem ans=12! / 4! * 8!
=12*11*10*9/24
=11*9*5
=495
2007-03-10 13:16:02 · answer #3 · answered by pradeep 1 · 0⤊ 2⤋