Q18 ARITHMETIC PROBLEMS

A survey on a sample of 25 new cars being sold at a local auto dealer was conducted to see which of the three popular options-air conditioning, radio and power windows - were already installed. The survey found:

15 had air conditioning

2 had air conditioning and power windows but no radios

12 had radio

6 had air conditioning and radio but no power windows

11 had power windows

4 had radio and power windows

3 had all three options.

What is the number of cars that had none of the options?

From the given conditions, we have

When we add all the values, we get a total of 23 cars. 

So, 2 cars don’t have the air conditioning or the radio, or the power windows

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