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There are 3 ants at 3 corners of a triangle, they randomly 
start moving towards another corner. What is the 
probability that they don't collide?
 Question Submitted By :: Requirements-Management
I also faced this Question!!     Answer Posted By  
# 1
The probability is 25% because there are 3 ants all with
two possible paths and 8 total possible outcomes. But
there are two possible outcomes that the ants don't
collide. Either they move one way or the other. 2/8 = 25%.
Is This Answer Correct ?    69 Yes 8 No
# 2
Each ant can move in 2 directions. Lets say direction are
Left (L) and Right (R). Solution if all ants move either
towards L or R. For L (1/2 * 1/2 * 1/2) = 1/8. Same for R =
1/8. Total for L and R = 1/8 + 1/8 = 1/4.
Is This Answer Correct ?    59 Yes 2 No
# 3
To prevent collision ants have to move in this particular way
A-->B,B-->C,C-->A ; probability=(1/2*1/2*1/2)

in opp direction
A-->C,C-->B,B-->A ; probability=(1/2*1/2*1/2)

probability that the ants doesnt coincide=

ans. 1/4
Is This Answer Correct ?    21 Yes 1 No
Sandeep Reddy
# 4
actually we have to take care that no 2 ants should
collide....therefore, that is only possible if 1st follows
the second and second follows the third and third follows
the it can be either clockwise or
anticlockwise....hence 2 ways out of 8 ways.....ans is
Is This Answer Correct ?    4 Yes 1 No
# 5
Actually we can say with absolute certainty that two of the
ants will move in the same direction. One of them may not.
It is a trick question. There is a 50/50 chance that one of
the ants may not move in the same direction as the other two.
So the answer is 50%.
Is This Answer Correct ?    1 Yes 2 No
# 6
How do you consider that the ants can move only in 2
directions (L or R) ? They could even move "randomly", say
straight, collide, and then move to some corner..
Is This Answer Correct ?    1 Yes 18 No

Other Requirements Management Interview Questions
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If during some stage down the life cycle, the initial requirements change, what will you do? How will you handle any changes in the requirements? IGT 1
If you look at a clock and the time is 3:15, what is the angle between the hour and the minute hands   11
How many times a day a clock's hands overlap?   15
Why are beer cans tapered at the top and bottom? Microsoft 3
difference between SAP BI & business object DW/ reporting iFlex 1
What new feature would you add to MSWORD if you were hired?   1
What will you do if you find that you cannot meet the requirements? Zenith 2
How many Gas stations are there in the US? HSBC 4
Why is it that hot water in a hotel comes out instantly but at home it takes time?   3
Maximum numbers that can be formed using all the 4 digits 6 4 8 1 without repetition and which is divisible by 9. Syntel 3
While doing HLD/LLD/Coding/Testing, how do you know that a specific HLD/LLD component, program code unit, or test case relates to a particular requirement?   1
what are the purposes of a requirements document?   1
For more Requirements Management Interview Questions Click Here 

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