Question on: JAMB Mathematics - 2005
In how many ways can 6coloured chalks be arranged if 2 are same colour?
A
60
B
120
C
240
D
360
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Correct Option: D
(\frac{6!}{2!}=ways=\frac{6\times5\times4\times3\times2!}{2!}=6\times5\times4\times3=360\hspace{1mm}ways)
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