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ans: option 3
since P(x<A) =F(x),
P(X=x)= F(x+) - F(x-)...here F(x)=cumulative distribution function,, P(x)=probability.....F(x)=integral(- infinity to A)[f(x)]...so F(x) is also a continuous function..
but it is asked to find probability at a point i.e.P(x=4)=F(4+) - F(4-)....but F(x) is a continuous function so its LHL and RHL is same...so P(X=4) become 0
about 11 years ago
soorya
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