# Riddle #766

Question: Mr. Smith has two children. If the older child is a boy, what are the odds that the other child is also a boy?

Riddle Discussion

By: nashlover007 on 13/6/16

50%

By: DeathTheKidRinO on 25/4/16

This is incorrect. It would actually be 1/3, and I will work it out here:\n\nHere are the 4 combinations\nGirl, Girl\nBoy, Boy\nGirl, Boy\nBoy, Girl\n\nNow, since we know that there is at least one boy, the first combination, Girl; Girl, is not possible. This leaves three combinations left ( Girl; Boy, Boy; Girl, and Boy; Boy). Only one of the three possible combinations is two boys, leaving the answer 1/3.

By: hirogaems on 2/7/16

I was also thinking that it was incorrect, but for a different reason: odds aren't given in the form of a percentage. The answer should be 1:2. The reason that it is 1:2 or 50%, though, is that Boy, Girl and Girl, Boy are equivalent. If you know that one of the kids is a boy, Girl, Girl is eliminated and you're left with Boy, Girl and Boy, Boy. It's a coin toss. If you stipulate that the order you list the possibilities in is linked to their order of birth, you can then include both Boy, Girl and Girl, Boy... but then once you know the first born was a boy, you still have to get rid of Girl, Boy and Girl, Girl. You're still left with a 50/50 chance that the second child is also a boy.

By: DeathTheKidRinO on 25/4/16

Okay, this was my first comment on this website, and I did not know that you cannot use the enter key without getting a bunch of crap... Please do not mind the horrid, terrifying "\\n"s that replace the areas where I meant to move down a line.

By: louisedmh on 20/4/16

50%

50

By: RiddleMastery on 17/1/16

Is this a riddle for children? It is even hard for me lol

### Similar Riddles

##### NCIS riddle (medium)

Question: a man walks into a bar and asks for a glass of water' the bartender pulls out a shotgun and shoots missing the mans head by 2 inches. the man stands up lays a 20\$ on the table and thanks the bartender. why did he thank the bartender?

##### The Weight Lifting Challenge (medium)

Question: Alex was the strongest man in the world. He can lift up something that weighs 1000 kg easily. He can even pick up five women at once without any pain. But one day, there was a Weight Lifting Challenge Show. All the top 5 strongest man entered including Alex. The challenge is that they each have to lift up a really heavy object which weighs 1005 kg for five minutes. The winner is who didn’t drop it until it reached the time. If they all did it, the judges will decide to give first place to a person who can lift it up easily and stand still with no trouble looking. If Alex was the strongest man, he’ll probably come first. But he came second instead when the challenge was over. Why?

##### Logic Riddle (medium)

Question: What are the next two letters in the following series and why? WATNTLITFS__

##### Heaven and Hell (medium)

Question: There were 2 doors. Behind the 1 door, is hell and behind the other door, is heaven but you don't know which door will take you to heaven. In front of them, there were 2 brothers, which is guarding the door. One of the brother always lie and the other one always tell the truth. Of course you don't know who is lying and who is not. You only get 1 question to ask one of them to figure out which door leads to heaven. What question you might ask? Remember you only get to ask 1 question. it means that you can't ask one question each of them. that will be 2 questions. You only ask 1 question to any of them and no more. How do you do that?

##### The Traveler (medium)

Question: A traveler is walking in the jungle. Then he found 4 paths. In the first one has a really deep mud. When people go there, they never come back. Second path have broken tracks, which is really unsafe for the people who take this path. In the third path, there is lion who didn't eat and drink anything for 3 months, so it might be really hungry by now. Last one have dinosaurs and volcanoes, so it's a very dangerous place. So, which path is the best for the traveler to take.