MBA Exam

In how many ways can 8 similar rings be worn on 5 fingers of a hand ?please provide solution

1) 56
2) 495
3) 715
4) 1287

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MBA Other Question
If b (a – 1) = √3b – 1,

1) 18 + 9√3
2) 20 + 7√3
3) 18 + 10√3
4) 20 + 8√3
5) None of these
 Then find the value of an ?

1) n
2) n + 1
3) n - 1
4) n + 1 / 2
5) n / 2