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OpenStudy ($oumya):
In an examination there are three examinees with the serial No. (a-1), (a) and (a+1). If the seat number of each and every room in the examination centre is (b) and all the examinees are arranged serially, then calculate the probability…the mentioned three examinees will seat in a same room.
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OpenStudy (rational):
is it \(\dfrac{b-2}{b}\)
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