সব প্রশ্নে ফিরে যান
Math
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%
সঠিক উত্তর
C) 50%
D) 66.2/3%