Let the cumulative distribution function of a random variable π x π be π F(x) = 0, & if x ≤ 0 x8, & if 0 < x ≤ 4 π. Find π P(1.50 ≤ x ≤ 2.75) π.
a) 0.14
b) 0.25
c) 0.31
d) 0.36