x = 1 x = 5 1 f x = x + 2 7 C 20 20 • 5 1 P(1 < X < 5) = න 20 x + 2 3 D 1 • 20 P(1 < X < 5) = L ABCD 1 A B P(1 < X < 5) = (AD + BC) AB 2