posted by kia on .
Draw a venn diagram to illustrate the following. In a shop 50 cars were inspected and it found that 23 needed new brakes and 34 needed new tires. 3 needed no services at all how many needed new brakes and new tires? How many only needed brakes? Please help
label the intersection of the two circles as x
so the 23 includes the x and the 34 includes the x
50 = 23 + 34 - x + 3
x = 10
so 10 needed both brakes and tires, so
13 needed only brakes