A) 65
B) 70
C) 71
D) None of these
Correct Answer: B
Solution :
[b] Here in this case condition is similar to formation of necklace i.e., \[(n,k)=\frac{1}{n}\sum\limits_{i=1}^{n}{{{k}^{god(n,i)}}}\] We can use this formula or from the table (you shouldn?t memorize it) required number of ways is 70.
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