
Kenneth S. answered 11/24/16
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The three gentlemen each pitched in $10 and it was accounted for as follows:
25 to the hotel, 3 for refund, 2 for the bellboy (unbeknown to the men or the hotel).
From the standpoint of the three gentlemen, they each put out 9 bucks; 27 - 2 which bellboy pocketed = $25 paid, including discount; they don't know about the discount and that's why the bellboy skimmed $2).