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The average of two numbers A and B is 20...

The average of two numbers A and B is 20, that of B and C is 19 and of C and A it is 21. What is the value of A?
दो संख्याओं A तथा B का औसत 20, B तथा C का औसत 19 और C तथा A का औसत 21 है। A का मान क्या है?

A

24

B

22

C

20

D

18

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