On carrying out a later survey on the efficiency of the lights, brakes and steering on the

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On carrying out a later survey on the efficiency of the lights, brakes and steering on the 100 vehicles of Question 14, the report was as follows:

no. of vehicles with defective lights = 42 no. of vehicles with defective brakes = 30 no. of vehicles with

no. of vehicles with defective lights, brakes and steering 3

Use a Venn diagram to determine

(a) How many vehicles were non-defective;

(b) How many vehicles had defective lights only.

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