A policeman inspected the safety of tyres on cars passing through a checkpoint. The number of tyres X which needed replacing on each car followed the probability distribution below. x 0 P(X= x) 0.68 a Find the value of k. c Find P(X> 1), and interpret this value. 1 0.2 2 3 0.06 k b Find the mode of the distribution. 4 0.02

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