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In a college, the science department has three disciplines.
In total, 280 students study chemistry, 254 students study
physics and 280 students study biology. 97 students study
both chemistry and physics, 138 students study both physics
and biology, 152 students study both chemistry and biology.
73 students study all three disciplines. Can you determine
how many students there are in the science department?
- 7 Answers
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Answer / megs
500
How?
n(C)=280
n(P)=254
n(B)=280
n(CnP)=97
n(PnB)=138
n(CnB)=152
n(CnPnB)=73
n(CUPUB)=n(C)+n(P)+n(B)-n(CnP)-n(PnB)-n(CnB)+n(CnPnB)
=280+254+280-97-138-152+73
=500
| Is This Answer Correct ? | 33 Yes | 1 No |
Answer / ram kumar.y
answer is 500.
i followed the same formula but in a logical way!
n(C)=280
n(P)=254
n(B)=280
n(CnP)=97
n(PnB)=138
n(CnB)=152
n(CnPnB)=73
n(CUPUB)=n(C)+n(P)+n(B)-n(CnP)-n(PnB)-n(CnB)+n(CnPnB)
=280+254+280-97-138-152+73
=500
| Is This Answer Correct ? | 14 Yes | 2 No |
Answer / suresh
dude its science n not computer.uh..... i think no.of
students is 73.(in all three P,C,B).387 in any2 departments.
| Is This Answer Correct ? | 5 Yes | 8 No |
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