CAT/2003

Question . 12

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?