Question

in a survey of 25 students , it was found that 15 had taken maths , 12 had taken physics , a and 11 had taken chemistry , 5 had taken maths and chemistry , 9 had taken maths and physics , 4 had taken physics and chemistry , 3 had taken all the three. find : 1.the no. of students who took only chemistry , only maths , only physics , physics and chemistry and not maths , maths and physics but not chemistry , only one of thes ubjects , at least one of the 3 subjects .

Answer 1

Only chemistry-5
Only maths-4
Only physics-2
Maths+physics only-6
Maths+chemistry only -2
Physics+chemistry only-1