In how many ways can the letter of ZOOLOGY be arranged?
MATHEMATICS
JAMB 2022
In how many ways can the letter of ZOOLOGY be arranged?
- A. 720
- B. 360
- C. 840
- D. 120
Correct Answer: C. 840
Explanation
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
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