the average weight of a,b and c is 45 kg that of a and b is 40 kg and b and c is 43 kg. what is weight of b?
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Answer:
b = 31 , a = 49 .c = 55
Step-by-step explanation:
[a+b+c]/3=45
a+b+c =135
[a+b]/2 =40
a+b =80
[b+c]/2 =43
b+c =86
a+b +b+c = 80 +86
a +b + c + b =166
135 + b = 166
b =166 -135 =31
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