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There are n students in a class. Ler P(E...

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)`.
Proportional constant k is equal to

A

0.25

B

0.5

C

0.75

D

0.35

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The correct Answer is:
(c)
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