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The average of the marks obtained in an ...

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

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The correct Answer is:
C
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ARIHANT PUBLICATION PUNJAB-PROBLEMS BASED ON ARITHMETIC - CHAPTER EXERCISE
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  16. The speed of a boat in a river is 20 km/h and the speed of another boa...

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