Answer: I hope this is helpful
Explanation:
A 4-digit number contains at least one even digit. To find:How many such numbers are there?Solution:Digits are 0,1,2,3,4,5,6,7,8,9.Number of odd digits = 5Number of even digits = 54-digit numbers are from 1000 to 9999.Total number of 4-digit numbers = 9000Possible ways to get odd digits on all the 4 places isIt means 625 numbers are their in which all 4 digits are odd.To find total 4-digit number that contains at least one even digit, subtract the numbers which contains only odd numbers from the total 4-digit numbers.Therefore, total 4-digit number that contains at least one even digit is 8375.