Course Total number of students who have enrolled for the course Percentage of students who have enrolled for the given courses from different colleges P Q R S C++ 2000 26 20 19 35 Java 2400 27 30 25 18 Linux 1500 32 20 25 23 SQ. 1800 24 32 28 16 Coco SD 2800 21 20 21 38 Out of the total number of students who have enrolled for C++, 60% were able to pass the exam. If the respective ratio between the number of students from college P, Q, R and S who were able to pass the exam for C++ was 3 : 4 : 2 : 3, what is the number of students who were able to pass the exam for C++ from college Q?
A) 200
B) 420
C) 340
D) 300
E) 400
Correct Answer: E
$ \therefore $ Number of students who were able to pass the exam for C++ from college Q $ =\frac{4}{3+4+2+3}\times 1200=\frac{4\times 1200}{1200}=4\times 100=400 $