1. How many six-digit numbers are there? How many of them contain the digit 5? Note that the first digit of an n-digit n
Posted: Sun Jul 10, 2022 11:13 am
1. How many six-digit numbers are there? How many of them contain the digit 5? Note that the first digit of an n-digit number is nonzero. ina ah. c, d, and e? How