Question

the total number of 7 digits numbers so that the sum of digits even​

Answer 1

Answer:

So total number of 7 digit numbers=9999999 – 1000000+1). Out of 9000000 numbers, 4500000 are having the sum of digits as even and the remaining 4500000 are having the sum of digits as odd. Every alternate number has its sum of digits even and odd.

Step-by-step explanation:

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