The average weight of a family of five members (in kg) whose weights are 40 kg, 49 kg, 56 kg, 66 kg and 37 kg is:
A51.6
B49.6
C48.6
D50.6
A51.6
B49.6
C48.6
D50.6
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The average of 15 students in a class is 43. If each student's marks are doubled, what is the new average?