the total number of 5 digit numbers that can be composed of distinct digits form 0 to 9 is.
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_ _ _ _ _ there are 5 places to fill
_ on 1st place we can fill only 9 ways for eg:
029 it is two digit number not a three digit number
_ on 2nd place we can fill by 9 ways again
after it 3rd place by 8 ways and 4th place by 7 ways and 5th place by 6ways
so 9×9×8×7×6=27216
_ on 1st place we can fill only 9 ways for eg:
029 it is two digit number not a three digit number
_ on 2nd place we can fill by 9 ways again
after it 3rd place by 8 ways and 4th place by 7 ways and 5th place by 6ways
so 9×9×8×7×6=27216
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