There are n students in a class. Ler `P(E_lambda)` be the probability that exactly `lambda` out of n pass the examination. If `P(E_lambda)` is directly proportional to `lambda^2(0lelambdalen)`. If a selected student has been found to pass the examination, then the probability that he is the only student to have passed the examination, isA. `(1)/(sumn)`B. `(1)/(sumn^2)`C. `(1)/(sumn^3)`D. `(1)/(sumn^4)`

There are n students in a class. Ler `P(E_lambda)` be the probability

1.	There are n students in a class. Ler `P(E_lambda)` be the probability that exactly `lambda` out of n pass the examination. If `P(E_lambda)` is directly proportional to `lambda^2(0lelambdalen)`. If a selected student has been found to pass the examination, then the probability that he is the only student to have passed the examination, isA. `(1)/(sumn)`B. `(1)/(sumn^2)`C. `(1)/(sumn^3)`D. `(1)/(sumn^4)`
Answer» Correct Answer - (c)

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