In a class, 18 students took physics, 23 students took chemistry and 24 students took mathematics. Of these 13 took both chemistry and mathematics, 12 to took both physics and chemistry and 11 took both physics and mathematics. If 6 student offered all the three subjects,find : How many took exactly one of the three subject?
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Answer:
taking no. of students who took physics as A
" " " " " " chemistry as B
" " " " " " maths as C
Step-by-step explanation:
just find A INTERSECTION B INTERSECTION C
Answered by
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Step-by-step explanation:
1. 23+24-13=34
2. 18+23-12=39
3. 18+24-11 =31
4. TOTAL =104
5. 104÷6=20
- ANSWER=20
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