allery100 మంది విద్యార్థులలో 60 మంది గణితాన్ని, 50 మంది సైన్స్ను, 40 మంది రెండింటినీ ఇష్టపడతారు. కేవలం గణితాన్ని మాత్రమే ఇష్టపడేవారు ఎంతమంది?
A30
B20
C40
D60
Answer & Solution
Correct answer: B. 20
గణితం మాత్రమే = మొత్తం గణితం - రెండూ = 60 - 40 = 20.
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