(i) Total number of cards = 30
Number divisible by 3 = 3,6,9,12,15,18,21,24,27,30
P(probability that the number on the selected cards is not divisible by 3) = 20/30
(ii) P(E) = 0.8
P(not E) = 1-0.08 =0.92
(iii) P (the probability of the 2 students passing the examination) = 1 - 0.895 = 0.105