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How to solve the 9th question?
Answers (1)
First find out total 7 digit numbers that are possible which is 7! . Then subtract the numbers divisible by 5 which is 6! . You will get 4320 as the answer. Total numbers is 7 places and 7 numbers that's why 7! Divisible by 5 means last digit has to be 0 or 5. Here we have only 5 which is fixed in units place. Balance 6 numbers and 6 places which will give 6!. Trust this explains your query
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