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Probability Distributions (p-2) — Maths (commerce) STD 12 Commerce / Arts — Question

Maharashtra BoardEnglish MediumSTD 12 Commerce / ArtsMaths (commerce)Probability Distributions (p-2)1 Mark
Question
If $f ( x )$ is distribution function of discrete $r.v. x.$ with $p.m.f. p ( x )=k\left(\begin{array}{l}4 \\ x\end{array}\right)$ for $x =0,1,2,3,4$, and $p(x)=0$ otherwise then $F(-1)=........$
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