Suppose that the random variable ( x ) has the distribution function given by:
[ F(x) =
beginarray/ll
0 & if x < -1
1/4 & if -1 ≤ x < 1
1/2 & if 1 ≤ x < 3
3/4 & if 3 ≤ x < 5
1 & if x ≥ 5
endarray
.
]
Find:
[ P(x ≤ 1) = ______ ]
a) 0.25
b) 0.50
c) 0.75
d) 0.125