In how many ways can the letter of ZOOLOGY be arranged?
A
720
B
360
C
840
D
120
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
Zoology has 7 letters in total, with O repeated thrice
\(\frac{7!}{3!}\) → \(\frac{7*6*5*4*3*2*1}{3*2*1}\)
= 840ways
Source: WAEC / JAMB / NECO Classroom Archive (Record #64271)