An RRB mock test is conducted in three batches A, B, C of a class. The average marks of batch A are 42, that of batch B are 50 and that of batch C are 62. The average marks of batches A and B combined are 45 and that of batches B and C combined are 55. What are the average marks of all three batches combined?

An RRB mock test is conducted in three batches A, B, C of a class. The

1.	An RRB mock test is conducted in three batches A, B, C of a class. The average marks of batch A are 42, that of batch B are 50 and that of batch C are 62. The average marks of batches A and B combined are 45 and that of batches B and C combined are 55. What are the average marks of all three batches combined?
A.	51.50
B.	52
C.	54
D.	48.60
E.	None of these
Answer» E. None of these

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