Let F(x) be the cumulative distribution function (CDF) of a discrete random variable X which only has integer values. It is known that Pr[X=4]=0.15 and Pr[X=5]=0.3, as well as that F(3)=0.1, F(6)=0.75, and F(7)=0.95. Find Pr[4<X≤7].
A. 0.7
B. 0.4
C. 0.8
D. 0.5
E. 0.75
X is a discrete random variable whose probability distribution function (PDF) is shown below. Find Pr[−2<X<3].
x
−2
−1
1
3
5
Pr[X=x]
0.2
0.25
0.1
0.25
0.2
A. 0.35
B. 0.1
C. 0.8
D. 0.05
E. 0.25