Q. How many words can be made from the letters of the word DELHI, if L comes in the middle of every word?
A) 12
B) 24
C) 60
D) 6
Explanation
(b)
If $L$ is middle, then first two places can be filled by $\ ^{4}P_{2}$ ways and the last two digits can be filled in $2!$ Ways.
$\therefore$ Required number of ways $= \ ^{4}P_{2} \times 2!$
$= 12 \times 2 = 24$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.