A class of 20 students borrowed library books for their research projects. Some of the students borrowed 3 books each, and the rest borrowed 2 books each. lf a total of 52 books were borrowed, how many of the students borrowed 3 books each?
সঠিক উত্তর: Option D
3 টি করে বই নেয় x জন
2 টি করে বই নেয়(20-x) জন
A.T.Q,
2(20-x)+3x= 52
x=12