Question

Number of all 3 digit numbers containing atleast one odd and atleast one even digit is

• A. 575
• B. 600
• C. 675
• D. 775

Answer 1

Answer: (C)

Required number = Total - [all odd + all even]
$=900-[5\cdot 5\cdot 5+4\cdot 5\cdot 5]=900-(125+100)=900-225=675$