Question

in a survey of 25 students it was found that 15 had been taken maths 12 taken physics and 11 had taken chemistry 5 had taken maths and Chemistry 9 had taken maths and physics and 4 had taken Physics and Chemistry and 3 had take all the 3 subjects find number of students that had 1. only chemistry . 2. only maths . 3. only physics. 4. Physics and Chemistry not maths

Answer 1

1)11, 2)15, 3)12, 4)4