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Question Number 180558 by Acem last updated on 13/Nov/22
$${The}\:{football}\:{team}\:{meets}\:{in}\:{a}\:{circle}\:{to}\:{consult} \\ $$$$\:{about}\:{some}\:{plan}\:{to}\:{play},\:{what}'{s}\:{the}\:{probability} \\ $$$$\:{that}\:{the}\:{one}\:{player}\:{of}\:{the}\:{opponent}\:{team}\:{who}'{s} \\ $$$$\:{trying}\:{to}\:{eavesdrops}\:{is}\:{standing}\:{behind}\:{the} \\ $$$$\:{goalkeeper}? \\ $$
Answered by Acem last updated on 15/Nov/22
$${P}\left({A}\right)=\:\frac{\mathrm{11}×\mathrm{10}!}{\mathrm{11}×\mathrm{11}!}=\:\frac{\mathrm{1}}{\mathrm{11}} \\ $$