In carrying out a survey of the efficiency of lights, brakes and steering of motor vehicles, 100
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In carrying out a survey of the efficiency of lights, brakes and steering of motor vehicles, 100 vehicles were found to be defective, and the reports on them were as follows:
Use a Venn diagram to determine
(a) How many vehicles had defective lights, brakes and steering;
(b) How many vehicles had defective lights only.
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