In how many ways can 8 similar rings be worn on 5 fingers of a hand?
Explanation:
We know, n similar objects can be distributed in r different groups in n+r-1Cr-1 ways.
∴ 5 similar rings can be worn on 5 (different) fingers of a hand in 5+5-1C5-1 = 126 ways.
Hence, 126.
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