Question

in a survey of 25 students it has found that 15 had taken maths,12 had physics and 11 had taken chemistry,5 had taken maths and chemistry, 9 had taken maths and physics, 4 had taken physics and chemistry and 3 had taken all the three subjects.Find the number of student that had not take any of the subject.​

Answer 1

Answer:

2

Step-by-step explanation:

only maths =15−9−5+3 

=4

only phy =12−9−4+3=2

only chem =5⇒Total=11 

Atleast one =11+9+5+4−23

=29−6=23 

⇒ None =25−23=2

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