Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  CBSE XII  >>  Math  >>  Probability
0 votes

Assume that in a family,each child is equally likely to be a boy or a girl.A family with three children is chosen at random.The probability that the eldest child is a girl given that the family has at least one girl is

$\begin{array}{1 1}(A)\;\frac{1}{2}\quad(B)\;\frac{1}{3}\quad(C)\;\frac{2}{3}\quad(D)\;\frac{4}{7}\end{array} $

Can you answer this question?

1 Answer

0 votes
  • Out of 3 children if at least one is a girl than the sample space contain
  • \(S(G\;B\;G\;,G\;B\;B\;,G\;G\;G\;,G\;G\;B\;,B\;B\:G\;,B\;G\;B\;,B\;G\;G)\)
p(two girls/atleast 1 girl)
=4 favorable cases in the sample space of 7
'D' is correct choice
answered Feb 21, 2013 by poojasapani_1

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App