DISTRIBUTION FUNCTION PROBABILITY!

Question

IF DISTRIBUTION FUNCTION OF X IS GIVEN BY-

F(B)={ 0 B<0

1/2 0<=B<1

3/5 1<=B<2

4/5 2<=B<3

9/10 3<=B<3.5

1 B>=3.5

}

FIND

P(X=2)

Answer 1

Plot (B, F(B))

Note the jump at 2.

That is P(X=2)

4/5 - 3/5 = 1/5