In how many ways can the letter of ZOOLOGY be arranged?
In how many ways can the letter of ZOOLOGY be arranged?
720
360
840
120
Correct answer is C
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
Simply \(\frac{2\frac{2}{3} \times 1\frac{1}{2}}{4\frac{4}{5}}\)...
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