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The average of a and b is 10, average of...

The average of a and b is 10, average of b and c is 12 and average of c and a is 15. Find the average of a, b and c.
a तथा b का औसत 10 है, b तथा c का औसत 12 है और c तथा a का औसत 15 है | a, b और c का औसत कितना है ?

A

`37/3`

B

`74/3`

C

74

D

37

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