A combination lock on a suitcase has 4 wheels each labeled with digits 1 to 8 How many 4 digit combination lock codes are possible if no digit can be repeated?
the first wheel has 8 possibilities. the second wheel has only 7 possibilities as it cannot be the same as the first. the third wheel has 6 possibilities and the last has only 5 possibilities.
9,000 - all the numbers between 1,000 and 9,999 inclusive. * * * * * NO. Those are PERMUTATIONS, not COMBINATIONS. Also, the question specified 4 digit combinations using 4 digits. The above answer...
If no digit can be repeated then there are 5 combinations, abcd, abce, abde, acde and bcde.If you regard abdc as different from abcd then each of the 5 basic sets could be arranged 24 ways and the...