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Find k ,such that the function P(x...

Find k ,such that the function
`P(x)={{:(k({:(4),(x):}),,x=0","1","2","3","4,kgt0),(0,"otherwise."):}`
is a probability mass function (p.m.f.)

A

`1/2`

B

`1/4`

C

`1/8`

D

`1/16`

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The correct Answer is:
D
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