(Solved) The average weight of A, B, C is 45 kg.if the average weight of A and B is 40 kg and that of B And C is 43 kg, then the weight of B is:

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 Question :

The Average weight of A, B, C is 45 kg.if the average weight of A and B is 40 kg and that of B And C is 43 kg, then the weight of B is:


Solution :

Sum of average weight = A+B+C  = 45

                                                   3

                                              A+B+C = 45×3

                                              A+B+C = 135......1)


Sum of average weight of A and B

A+B = 40

   2

A+B = 40×2

A+B = 80......2)


Sum of average weight of B and C

B+C= 43

   2

B+C = 43×2

B+C= 86.......3)


equation 2) + equation 3)

A+B+B+C =80 +86 = 166

A+2B + C = 166


=A+2B+C  - A+B+C

=166 - 135

= 31

B= 31 Kg














Any queries about Solution please comment below. 

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