The average of the marks obtained in an examination by 8 students was 51 and by 9 other students was 68. The average marks of all 17 students was:

The average of the marks obtained in an examination by 8 students was

1.	The average of the marks obtained in an examination by 8 students was 51 and by 9 other students was 68. The average marks of all 17 students was:
A.	59
B.	59.5
C.	60
D.	60.5
Answer» D. 60.5

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The average of the marks obtained in an examination by 8 students was 51 and by 9 other students was 68. The average marks of all 17 students was:

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