Q. 345.0( 2 Votes )

Out of 100 students, two sections of 40 and 60 are formed. If you and your friend are among 100 students, what is the probability that: (i) you both enter the same section? (ii) you both enter the different section?

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 .


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses
RELATED QUESTIONS :