1 votes 1 votes Out of 100 students, 10 students used to drink milk(M), coffee(C) and Tea(T); 20M and C; 30C and T; 25M and T; 12M only; 5C only and 8T only. The number of students who did not drink any of this is a) 18 b) 24 c) 20 d) 16 Quantitative Aptitude permutation combinatory sets + – Aakash Das asked Jun 7, 2016 edited Jun 7, 2016 by Leen Sharma Aakash Das 30 points 14.4k views answer comment Share See all 0 reply Please log in or register to add a comment.
Best answer 4 votes 4 votes Number of student who drinks at least one of them =12+5 + 8 + 10 + 20 +15 +10 =80 Hence,Number of student who did not drink any of this = 100 - 80 =20 Hence,Option (C) 20 is the correct chocie. Leen Sharma answered Jun 7, 2016 edited Jun 8, 2016 by Leen Sharma Leen Sharma 11.5k points comment Share See all 2 Comments See all 2 2 Comments reply Aakash Das 30 points commented Jun 8, 2016 reply Share Could you please tell me that this type of problems fall under what category ? and when we say that x people drink tea and cofee and y people drink tea then doesn't x include some part of y?So how can we simple add both of them ? 1 votes 1 votes Leen Sharma 11.5k points commented Jun 8, 2016 reply Share These types of problem falls in Set Theory. and there is difference between x drinks coffee and x drinks " only " coffee.Please read question carefullly. 1 votes 1 votes Please log in or register to add a comment.