Question

total number of 4 digits odd number is​

Answer 1

Step-by-step explanation:

Now the digit should be odd and hence last digit should be

filled with an odd number

⇒ Number of way to filled last number =4 (i.e. 1,3,5,7)

⇒ Number of way to filled third digit =6 (i.e. 0,1,2,3,5,7)

⇒ Number of way to filled second digit =6 (i.e. 0,1,2,3,5,7)

⇒ Number of way to filled first digit =5 (i.e.1,2,3,5,7)

⇒ Total 4digit number =4×6×6×5

=720

Answer 2

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