Question

The number of 3 digit odd numbers, that can be formed by using the digits 1, 2, 3, 4, 5, 6 when the repetition is allowed, is.

• A. 60
• B. 108
• C. 36
• D. 30

Answer 1

Answer: (B)

108

Answer 2

Extreme left place can be filled in 6 ways, the middle place can be filled in 6 ways and extreme right place in only 3 ways.

($\because$number to be formed is odd)

∴Required number of numbers = 6 × 6 × 3 = 108.