Find the expected value of the random variable X with probalbilty density function defined by f(x)=… Show more Find the expected value of the random variable X with probalbilty density function defined by f(x)= 3x^2/26 on the intetrval [1,3]?? a.3/26 b.300/169 c.3/104 d.3/4 e.30/13 In the xy-plane, the curve with parametric equation x=cost and y=sint, 0 a.3 b. 2pi c.pi d.pi/2 e.1/2 • Show less