Permutation and CombinationHard

Question

The number of ways in which 5 beads, chosen from 8 different beads be threaded on to a ring, is:

Options

A.672
B.1344
C.336
D.none

Solution

First we select 5 beads from 8 different beads to 8C5
Now total number of arrangement is
8C5 × = 672

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