10 If the mean of five observations is 8, and the deviations of these observations about their mean are: -2, 3, -5,0, 4. Then the value of the second observation is: * (2 Points) Oo 011 O 3 06 9 Given that the two events A and B are independent, such that: P(B)=0.5 and P(A)=0.3, then the probability that at least one of them occurs equal to: (2 Points) O 0.15 O 0.42 0 0.65 O 0.58