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Question Number 131062 by benjo_mathlover last updated on 01/Feb/21
Youfliptwofairsix−siddeddiceandaddthenumberofspots.whatprobabilityofgettinganumberdivisibleby2butnotby5?
Answered by EDWIN88 last updated on 01/Feb/21
WriteLnforeventhenumberisdivisiblebyn.NowP(L2)=1/2.(countthecase;ormoreelegantlynoticethateachdiehasthesamenumberofoddandevenfacesandworkfromthere)NowP(L2−L5)=P(L2)−P(L2∩L5)butL2∩L5containsonlythreeoutcomes(6,4),(5,5)and(4,6)soP(L2−L5)=12−336=512
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