JEE Main 2019 — Probability Question with Solution
JEE Main 2019 (10 Apr Shift 1)
Question
Assume that each born child is equally likely to be a boy or girl. If two families have two children each, then the conditional probability that all children are girls given that at least two are girls is:
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
Family has four children in total.
Total number of ways in which at least two girls are there
is
Favourable case in which all are girls is
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This is a previous-year question from JEE Main 2019, covering the Probability chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.