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Raghu Surat SVNIT Grade: Upto college level
        

Q.  How many 6-digit numbers are there, in which the sum of the digits is even?

6 years ago

Answers : (1)

Mayank Jain
37 Points
										

Dear Raghu,


Total no of 6 digit numbers possible = 9x10x10x10x10x10=9 x 105 ( excludign those starting with 0 and when the repetition of digits is allowed)


now 1st no is 100000....teh sum of the digits for this no is 1 which is odd


next no is 100001....the sum of the digits is 2 which is even 


........


this series will go on till 999999


so the required no of 6 digited numbers will be 1/2 of 9 x 105 = 4.5 x 105 = 45 x 104 numbers.. 


 


Ashray Jain


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6 years ago
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