The Gateway to Computer Science Excellence
First time here? Checkout the FAQ!
+2 votes

A man visits a couple who have 2 children. one of the children, a boy, comes into the room. find the probability p that the other is also a boy.





asked in Probability by Boss (18.2k points) | 540 views

1 Answer

+5 votes
Best answer

Since, it's given that the first one is a boy, the second event is independent of the first and the probability is 1/2.(The sample space contains only the events concerning the second child ({G, B}) . Had the question been "what's the probability of both the children coming to the room being boys given that one is surely a boy", then the sample space will contain BB, BG and GB and probability would be 1/3)

answered by Boss (18.2k points)
selected by
so the answer for this question is c?
No,1/2 should be answer

Related questions

Quick search syntax
tags tag:apple
author user:martin
title title:apple
content content:apple
exclude -tag:apple
force match +apple
views views:100
score score:10
answers answers:2
is accepted isaccepted:true
is closed isclosed:true
50,126 questions
53,251 answers
70,502 users