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 ?

A 20%
B 33.1/3%
C 50%
D 66.2/3%

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 %
Bissoy MCQ

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Which of the following is a valid assumption made in the viven argument?Premise I: People who wear glasses are smart.Premise II: John wears glasses.Conclusion: John is smart.

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