top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration Why to Join

    Get Free Puzzle Updates

Facebook Login
Site Registration

What is the probability that other side is also tail ?

0 votes
23 views

I have two coins.
* One of the coin is a faulty coin having tail on both side of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blind fold myself and pick a coin and put the coin on table. The face of coin towards the sky is tail.

What is the probability that other side is also tail ?

posted Jun 13 by Deepak Chitragar

Share this puzzle
Facebook Share Button Twitter Share Button Google+ Share Button LinkedIn Share Button Multiple Social Share Button

1 Answer

0 votes

Here we have 3 tails and 1 head.
Since we have 1 tail exposed at the beginning itsellf, the probability of the flip side to be tails drops from 3/4 to 2/3 which is also the answer to this question.

answer Jun 14 by Tejas Naik



Similar Puzzles
+2 votes

A and B have two children. The probability that the first child is a girl is 50%. The probability that the second child is a girl is also 50%. A and B tell you that they have a daughter.

What is the probability that their other child is also a girl?

0 votes

A couple has two children, one of the child is a boy. What is the probability that the other child is also a boy?

Hint: Its not 1/2.

+3 votes

In a hotel, rooms are numbered from 101 to 550. A room is chosen at random. What is the probability that room number starts with 1, 2 or 3 and ends with 4, 5 or 6 ?

0 votes

Upon tossing a fair coin five times, you get heads every time. What is the probability that in the next toss, it will land with tail?

+4 votes

There are 4 people in a closed room and you are waiting outside to enter into the room. You can enter only when one of them opens the door. The probability that somebody will open the door is 1/2. Now what is the probability that the door will be opened so that you can go inside?

Contact Us
+91 9880187415
sales@queryhome.net
support@queryhome.net
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Bangalore-560102
Karnataka INDIA.
QUERY HOME
...