Elitmus
Exam
Numerical Ability
Probability
IF There are 9 people in a group,then what is the probability of getting ATLEAST 2 persons between any of two persons?
Read Solution (Total 6)
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- 3/4
9C2=36
7+6+5+4+3+2=27
p=27/36=3/4 - 10 years agoHelpfull: Yes(14) No(2)
- 7/12
9C2=36
6+5+4+3+2+1=21
21/36
7/12
- 10 years agoHelpfull: Yes(13) No(2)
- 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
- 10 years agoHelpfull: Yes(4) No(1)
- 1-8!x2/9!=7/9 ans was dis in option??
- 10 years agoHelpfull: Yes(0) No(4)
- i don't have option.
- 10 years agoHelpfull: Yes(0) No(0)
- shrey why its not 7+6+5+4+3+2+1
- 10 years agoHelpfull: Yes(0) No(2)
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