question_answer

In a class test, in Mathematics, 10 students scored 75 marks, 12 students scored 60 marks, 8 students scored 40 marks and 3 students scored 30 marks. The mean of their score is (approximately) ____.

A)  57 marks                     

B)  56 marks         

C)         15 marks         

D)         54 marks                     

Correct Answer: A

Solution :

Total scored of all students Total number of students = 10 +12 + 8 + 3                                     = 33 Mean score (approx.)