Task: Question Answering
Input (English): Question: If the average marks of 3classes of 55, 60 and 45 students respectively is 50, 55, 60, then find the average marksof all the students is

 Option A: 53

 Option B: 53.5

 Option C: 54.68

 Option D: 55.6

 Option E: 67.2
Output (English): Option C