# Popular Probability Puzzle

1,527.9K Views

This is a popular probability puzzle in which you have to select the correct answer at random from the four options below.

Can you tell, whats the probability of choosing correct answer in this random manner.

1) 1/4
2) 1/2
3) 1
4) 1/4

SherlockHolmes Expert Asked on 10th August 2015 in

0%

Explanation:
1) Why can’t be 1/4 :
If the answer is 1/4, then as we know two out of four answer choices is ‘1/4’, the answer has be 1/2.
This is a contradiction, so the answer cannot be 1/4.

2) why cant be 1/2 :
If the answer is 1/2 then because answer:”1/2″ is 1 out of 4 answer choices, the answer must be 1/4. This is also a contradiction. So the answer cannot be 1/2.

3) why cant be 1 :
If the answer is 1 then because answer:”1″ is 1 out of 4 answer choices, the answer must be 1/4. Again the same contradiction and therefore answer cannot be 1.

Detective Expert Answered on 10th August 2015.

number of possible cases = 4
number of correct cases = 1
so probability = required/total no of cases
this is equal to 1/4

msantoshmadhav Scholar Answered on 13th December 2015.

• ## More puzzles to try-

• ### MEASUREMENT PUZZLE

You have a three gallon and a five gallon measuring device. You wish to measure out four gallons.Read More »
• ### Kill your Clone puzzle

How could you successfully kill a clone that is always thinking the exact same thing you are?Read More »
• ### Mask Girls

Jenifer leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing ...Read More »
• ### Countries without Alpha

Can you name some countries which do not have the alphabet \’A\’ in them?Read More »
• ### People in Bus

You are on a bus. 10 people get on at the first stop. At the next stop 25 people get ...Read More »
• ### Dinner with girldfriend riddle

Why did the boy John make the girl Minda pay for her own meal on their date?Read More »
• ### What are the three cards?

There are three playing cards lying face up, side by side.  A five is just to the right of a ...Read More »
• ### Mixing vinegar and oil

You have two jars.  One contains vinegar, the other oil.  The two jars contain the same amount of their respective ...Read More »
• ### Who am I?

I am a 8 letter word Many wasted time in hunting me, rather I’m in the form of hardwork. 5,6,7,8 ...Read More »
• ### It Comprises Roots

It comprises roots which nobody sees, Much taller than those trees, Up and up it goes, Still, it never grows.Read More »
• ### Crack the code puzzle

A numeric lock has a 3 digit key- HINT- A. 6 8 2 – One Number is correct and well ...Read More »
• ### 98 dollar riddle

A man phoned his son to buy a few things he needed for a trip. He told him he would ...Read More »
• ### Breakfast— Question for IAS

What can you never eat for breakfast?Read More »
• ### Anti-Ogre Potions

The king had his doubts about his sons’ fighting skills, and so he sent his two eldest to the court ...Read More »
• ### Pink Riddle

In a one story house, everything is pink, the dog is pink, the cat is pink, the walls are pink, ...Read More »
• ### Flour Selling puzzle

You are selling White Flour and have two measuring cups. Cup A of Flour Costs \$30, Cup B of Flour ...Read More »
• ### Not to be used in Dinner

I am sure no one can have two things at dinner. what are they?Read More »
• ### Find the missing number

Find the missing number in the image below.Read More »
• ### NDA Exam 2013 – Find the missing Number?

Which number replaces the question mark?Read More »
• ### Can you deduce that pattern and find the missing set?

In the following series, a set of numbers is progressing with a particular patter. Can you deduce that pattern and ...Read More »