statistcs and probability

A company determines the probabilities for the number of defective transistors in carton of transistors X 0 3 P(X) 0.91 0.01 0.03 0.02 0.03 Then the values of E(X) and V(X) are: E(X)=1.34 and V(X)=0.9244 O None of these O E(X)=0.25 and V(X)=0.7275 E(X)=7.8 and V(X)=1.56 O * Question Suppose it is known that a company completes a certain type of order in average of 45 minutes with a standard deviation of 15 minutes, and that for a second type need 30 minutes long with a standard deviation of 20 minutes. If a manger randomly observes 35 from the first type and 40 from the second type, what is the probability that the average time to complete the task of the type I will be more than 20 minutes from the type 2? 0.0003 O 0.1093 O 0.9654 O 0.3121 O