Statistics

If you know for certain that a friend of yours has 2 children and that atleast one of them is a boy, what is the probability that the other is also a boy?

Data Scientist

DigitalOcean

Adyen

Qualcomm

Zomato

PayPal

ASML

Did you come across this question in an interview?

  • If you know for certain that a friend of yours has 2 children and that atleast one of them is a boy, what is the probability that the other is also a boy?
  • Let's say you have a friend who has two children, and they tell you that at least one of them is a boy. What's the probability that the other one is a boy?
  • Based on what you know, do you think it's more likely or less likely that your friend's other child is also a boy?
  • You have a friend who has two kids. They tell you that they have at least one boy. What do you think are the odds that the other child is also a boy?
  • Can you figure out the probability of your friend having two boys, given that you know for certain that they have at least one boy?
  • Imagine your friend has two children, and they specifically mention to you that one of them is a boy. What is the likelihood that the other child is also a boy?
  • Your friend has two kids, and they mention to you that they have at least one boy. What's the chance that the other one is also a boy?
  • Given what you know about your friend having two kids and at least one of them being a boy, what is the possibility that the other child is also a boy?
  • Assume that your friend has two children and tells you that at least one of them is a boy. What is the probability that the other one is a boy as well?
  • If your friend has two children and they tell you that they have at least one boy, what are the odds that the other child is also a boy?
  • If your friend has two kids and you know for sure that one is a boy, what are the chances that the other one is also a boy?

Interview question asked to Data Scientists interviewing at Qualcomm, Noom, Coupang and others: If you know for certain that a friend of yours has 2 children and that atleast one of them is a boy, what is the probability that the other is also a boy?.