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) ____.

In a class test, in Mathematics, 10 students scored 75 marks, 12 stude

1.	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
Answer» B. 56 marks

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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) ____.

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