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Question Number 110911 by Ar Brandon last updated on 31/Aug/20
FourteachersA,B,C,andDeachproposedtwoexercises,oneonalgebraandanotheronanalyses,toformanexam.Thestudentshavetochoosetwoexercisesatrandom.1.CalculatetheprobabilityP(a)ofastudenttochoosetwoexercisesonalgebra.a∖P(a)=316,b∖P(a)=314,c∖P(a)=14,d∖None2.CalculatetheprobabilityP(b)ofchoosingtwoexercisesproposedbythesameteacher.a∖P(b)=110,b∖P(b)=160,c∖P(b)=17,d∖None3.CalculatetheprobabilityP(c)ofchoosingtwoexercisesproposedbyteacherA.a∖P(c)=13,b∖P(c)=14,c∖P(c)=128,d∖None
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