Question

How many numbers lying between 500 and 600 can be formed with the help of the digits 1, 2, 3, 4, 5, 6 when the digits are not to be repeated.

• A. 20
• B. 40
• C. 60
• D. 80

Answer 1

Answer: (A)

20

Answer 2

There must be 5 at hundred place, now 2 numbers to be chosen from 5 numbers $i.e.$, $5P_{2} = 5 \times 4 = 20$.