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The average weight of 12 gold coins is 2...

The average weight of 12 gold coins is 20 g per coin. The average weight of 18 silver coins is 35 g per coin. What is the average weight per coin for 30 coins?

A

25 g

B

21 g

C

31 g

D

29 g

Text Solution

Verified by Experts

The correct Answer is:
D
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