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JAMB Mathematics 2022 Paper
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© africaexams.com
Question : 13
Total: 39
In how many ways can the letter of ZOOLOGY be arranged?
720
360
840
120
Validate
Solution:
Zoology has 7 letters in total, with O repeated thrice
7
!
3
!
→
7
*
6
*
5
*
4
*
3
*
2
*
1
3
*
2
*
1
= 840ways
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