S&T 2nd round Brainteaser most people screw up!
Came across this MM S&T brainteaser and wanted to share it with you guys:
You have three pancakes. One pancake is burnt on one of it's two sides. Another is burnt on both of its sides. The last one is not burnt on either of its sides.
If we were to stack these three pancakes on top of each other and you can see that the top pancake is burnt on its top side, what is the probability that the top pancake is the pancake that is burnt on both sides?
Apparently, nearly everybody who interviews answers 1/2 but the correct answer is actually 2/3.
How anyone manages to get this brainteaser incorrect is beyond me :(
It's actually fairly simple to understand how someone could get this incorrect..
'2 of the pancakes have burnt sides and I see that the top one has a burnt side, therefore it is a 50% chance that the top one is burnt on both sides'
Your inability to consider someone else's thought processes is actually more dumbfounding to me.
Burn. Pun intended.
Pretty simple conditional probability, the trick is go by the number of sides not pancakes
P(Burnt both sides | Burnt) = P(Burnt both & Burnt) / P(burnt) = (2/6) / (3/6) = 2/3
Thanks!
.
bayes rule, and it first looks non intuitive but actually makes sensee
bump, can someone explain this to me?
Voluptate et magnam dolor aliquam. Et nostrum vel omnis maiores ut rerum rerum velit. Voluptatibus voluptas aliquid blanditiis velit ut eum quis.
Reiciendis enim quia voluptates hic numquam. Eos veritatis accusantium sapiente tenetur. Ut consequatur et sint accusamus cumque aspernatur aspernatur. Et id laudantium molestias beatae ea ullam.
Sed autem a iusto et. Velit doloremque cum quas aut aut praesentium tempora. Est laudantium ullam sint magnam odio. Fugit fugit suscipit modi corrupti sequi ad qui. Incidunt quam molestiae quos quaerat sit sed. Quaerat autem a deleniti laboriosam quaerat quia ut. Cumque et architecto rerum corrupti hic vitae.
Cum et molestiae doloremque labore sit. Itaque rem ipsum quisquam quis.
See All Comments - 100% Free
WSO depends on everyone being able to pitch in when they know something. Unlock with your email and get bonus: 6 financial modeling lessons free ($199 value)
or Unlock with your social account...