Q. All the words that can be formed using alphabets A, H, L, U, R are written as in a dictionary (no alphabet is replaced). Then, the rank of the word RAHUL is
A) 70
B) 71
C) 72
D) 74
Explanation
(d)
In the word RAHUL the letters are (A, H, L, R, U)
Number of words starting with A$= 4! = 24$
Number of words starting with H=$4! = 24$
Number of words starting with L$= 4! = 24$
In the starting with R first one is RAHLU and next one is RAHUL.
$\therefore$ Rank of the word RAHUL$= 3(24) + 2 = 74$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.