Q. 345.0( 2 Votes )

Out of 100

Answer :

Given:


Section A contains 40 students


Section B contains 60 students


It is told that you and your friend are among 100 students


We need to find:


i. You both enter the same section


ii. You both enter the different section


P(Ssame) = P(You and your friend enter same section)


This happens only in the case if you and your friend belongs to either section A or section B.


P(Ssame) = P(Both belongs to section A) + P(Both belongs to section B)








P(Sdiff) = P(You and your friend enter different section)


This happens only in the case if you belongs to A and your friend belongs to section B.


P(Sdiff) = 1-P(Both belongs to same section)


P(Sdiff) = 1-P(Ssame)




The required probabilities are .


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