Question

The prefects did a spot check on the pupils of a class. They found that 9 pupils did not have a school badge, 12 of them did not wear proper school shoes and 3 had committed both offences. If there were 39 pupils altogether in the class, how many of them did not commit any of the offences. Please use a venn diagram to solve the ques and show workout.

Answer 1

Step by Step...

Answer 2

can u explain you answer?

Answer 3

1) start with the both category in the center.
2) because 9 didn't have a badge and we already know 3 didn't, that leaves 6 only without a badge. do the same for shoes.
3) add up the total violators now and subtract from the total in the class to get the "good" kids. Put that number outside the venn diagram inside a box. The box represents the universe, in this case the classroom of students

Answer 4

Do you get it?

Answer 5

i think i get it

Answer 6

thanks mate

Answer 7

to check you can always add up the numbers to make sure you arrive at the total for each part of the question. You're welcome.