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A,B और C का औसत वजन 45 कि.ग्रा. है। यदि A और B का औसत वजन 40 कि.ग्रा. हो और B और C का 43 कि.ग्रा. हो तो B का वजन बताइए ?

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A,B और C का औसत वजन 45 कि.ग्रा. है। यदि A और B का औसत वजन 40 कि.ग्रा. हो और B और C का 43 कि.ग्रा. हो तो B का वजन बताइए ?
A. 31 kg
B. 32 kg
C. 29.5 kg
D. 35 kg
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1 Answer

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Best answer
Correct Answer - A
Average of B = Average of [(A+B)+(B+C)-(A+B+C)]
`=[40 xx 2+ 43 xx 2 -45 xx 3]`
=80+86 - 135
= 31 kg
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