Latest PRATIAN Aptitude Question SOLUTION: Four people each roll a four die once. find probability that at least two people will Roll the same number. a) 5/18 b) 13/18 c) 1295/1296 d) none of these.

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(#M40152841) PRATIAN Numerical Ability question Probability Keep an EYE

Four people each roll a four die once.
find probability that at least two people will Roll the same number.
a) 5/18
b) 13/18
c) 1295/1296
d) none of these.

Asked In PRATIAN Sourabh Prasad (8 years ago)

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Sharath  (8 years ago)

The first person rolls a die, and gets a number.

The second person has a 5/6 chance of rolling a different number.

The third person has a 4/6 chance of rolling a number different from those two.

The fourth person has a 3/6 chance of rolling a number different from all three.

The odds that no two will roll the same number is 5/6*4/6*3/6 = 5/18 = .

That's the odds that no two will roll the same number, so the odds that two (or more) of them will roll the same number is 1-5/18 = 13/18

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shyamili  (8 years ago)

ans a
5/18

Is this solution Helpfull? Yes | No (1)  

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