Question

In a survey of 25 students, it was found that 15 had taken mathematics, 12 had taken Physics and 11 had taken Chemistry, 5 had taken Mathematics and Chemistry, 9 had taken Mathematics and Physics, 4 had taken Physics and Chemistry and 3 had taken all the three subjects. Find the number of students that had -
(i) Only Chemistry
(ii) Only Mathematics
(iii) Only one of the subjects
(iv) None of the subjects.

plz ans it..​

Answer 1

Step-by-step explanation:

(i) 11−5−4+3=5

(3 removed twice)

(ii) 4−3=1

(iii) only maths =15−9−5+3

=4

only phy =12−9−4+3=2

only chem =5⇒Total=11

(iv) Atleast one =11+9+5+4−2(3)

=29−6=23

⇒ None =25−23=2

Answer 2

Answer:

none of the subjects. 3erd is right