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In how many ways can 5 keys be put in a ring
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Verified Answer
The correct answer is:
$\frac{1}{2} 4!$
Required number of ways $=\frac{1}{2}(5-1)!=\frac{4!}{2}$.
\{Since clockwise and anticlockwise are same in case of ring\}.
\{Since clockwise and anticlockwise are same in case of ring\}.
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