Answer :

(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) =

(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

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