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Discrete random variables — Question 121

Original QCE Vault practice · 1 mark

Q121 · Practice questionTechnology-freeSimple familiar1 mark

QUESTION 121

A discrete random variable has P(X=1)=kP(X=1)=k, P(X=2)=2kP(X=2)=2k and P(X=3)=3kP(X=3)=3k. Determine kk.
(A)
13\dfrac13
(B)
16\dfrac16
(C)
15\dfrac15
(D)
112\dfrac1{12}
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