Multiple choice

A couple has two children. What is the probability that they have one son and one daughter? Assume that there is no bias towards son or daughter.

  1. 1/3

  2. 1/2

  3. 1/4

  4. 1

  5. It depends on other factors
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

First issue can be a son or a daughter with probabilities of 1/2. Similarly the second issue too can be a son or a daughter with equal probabilities of 1/2.

So, there are four equally probable possibilities out of which two result in one son - one daughter combination. Required probability should be 2/4 or 1/2.

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