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Bunuel
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pratsh123
Hi Bunuel,

I am not very good at Sets & Venn Diagrams.
Please provide me a reference to some good explanation given by you.

Thanks & Regards,
Prateek Sharma

Theory:
how-to-draw-a-venn-diagram-for-problems-98036.html
advanced-overlapping-sets-problems-144260.html

DS questions on overlapping sets: search.php?search_id=tag&tag_id=45
PS questions on overlapping sets: search.php?search_id=tag&tag_id=65

Hope it helps.
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is there any fixed method to do this or we have to do trial and error?
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290 = 210 + ( people in orchestra)  - ( people in both)
80 = Orchestra - Both

Check which two options have a difference of 80.
150 and 230 suffice and is our answer. KarishmaB
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is there any fixed method to do this or we have to do trial and error?
­
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Aditya8624
is there any fixed method to do this or we have to do trial and error?
­Normally for TPA questions you do not need to check for every pair of values. The stimulus will give you constraints and all you need to do is look for values that satisfy those constraints. 

Of 290 people, 210 are in band so 80 are in 'only orchestra'. 
Hence difference between 'Orchestra' and 'Both' will be 80. 

The only set of values satisfying that is 230 and 150.

ANSWER: 230 & 150

Discussion on Two Part Analysis: https://youtu.be/O-iV8Vv4svY
 
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