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The average weight of 8 gold coins is 20...

The average weight of 8 gold coins is 20 g per coin. The average weight of 12 coins of silver is 35 g per coin. What is the average weight per coin for 20 coins?
8 सोने के सिक्कों का औसत भार 20g प्रति सिक्का है | चाँदी के 12 सिक्को का औसत भार 35 g प्रति सिक्का है | 2 सिक्को के लिए प्रति सिक्का औसत भार कितना है ?

A

25 g

B

29 g

C

21 g

D

31 g

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