The average weight of 7 persons increases by 3 kg when a new person comes in place of one of them weighing 56 kg. What might be the weight of the new person?
A66 kg
B77 kg
C59 kg
D71 kg
A66 kg
B77 kg
C59 kg
D71 kg
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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?