Latest Elitmus Aptitude Question SOLUTION: IF There are 9 people in a group,then what is the probability of getting ATLEAST 2 persons between any of two persons?

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(#M40039187) ELITMUS Numerical Ability question probability Keep an EYE

IF There are 9 people in a group,then what is the probability of getting ATLEAST 2 persons between any of two persons?

Asked In Elitmus deepak kumar (9 years ago)

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Mithun Kumar Kesari  (9 years ago)

3/4
9C2=36
7+6+5+4+3+2=27
p=27/36=3/4

Is this solution Helpfull? Yes (14) | No (2)  

shrey  (9 years ago)

7/12

9C2=36
6+5+4+3+2+1=21
21/36
7/12

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Dharmendra Singh  (9 years ago)

question should be at least two person among group of 9 people then required sol will be--
{2^9-(9c0+9c1)}/2^9
note: al least two we have to taken then only invalid cases are 9c0 and 9c1 so we subtract from total.. total will in the form of 2^x here x is no of persons

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moumita ghose  (9 years ago)

1-8!x2/9!=7/9 ans was dis in option??

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deepak kumar  (9 years ago)

i don't have option.

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nitu  (9 years ago)

shrey why its not 7+6+5+4+3+2+1

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