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प्रश्न
If the p.d.f. of a continuous random variable X is given as
`f(x)=x^2/3` for -1< x<2
=0 otherwise
then c.d.f. fo X is
(A) `x^3/9+1/9`
(B) `x^3/9-1/9`
(C) `x^2/4+1/4`
(D) `1/(9x^3)+1/9`
उत्तर
`F(x)=int_-1^xf(y)dy=int_-1^xy^2/3dy=[y^3/9]_-1^x=x^3/9+1/9`
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