Question 1152570
.


            The correct solution is as follows:



A = prob. of passing Jones' class
B = prob. of passing Smith's class
<pr>
P(A or B) = P(A) + P(B) - P(A and B)
<pr>
P(A or B) = 0.62 + 0.34 - 0.30
<pr>
P(A or B) = 0.66


--------------


Notice the difference between my solution and the solution by the tutor @VBFBundy in the 3-rd line.