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At a symposium , 20 % of the professors are psychologists , 60% are biologists , and the remaining 12 professors are economists . If 20 of the professors were glasses , what present of the professors do not wear glasses ?

At a symposium , 20 % of the professors are psychologists , 60% are biologists , and the remaining 12 professors are economists . If 20 of the professors were glasses , what present of the professors do not wear glasses ? Correct Answer 33.1/3%

ধরি, মোট Professor এর সংখ্য x x - 20x/100 - 6x/100 = 12 x - x/5 - 3x/5 = 12 5x - x - 3x /5 = 12 x = 60 number of professors do not wear glasses = ( 60 - 20) = 40 required percentage ( 40/60 × 100) % = 66 2/3 %

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At a symposium, 20% of the professors are psychologists , 60% are biologists and the remaining 12 professors are economist. If 20 of the professors wear glasses, what percent of the professors do not wear glasses?
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Statements : All the research scholars are psychologists. Some psychologists are scientists.

Conclusions :
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II. Some research scholars are scientists.
III. Some scientists are psychologists.
IV. Some psychologists are research scholars.
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