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Average weight of A,B,C=38kg. Average of A,B=25kg. Average of B,D=28kg. D:C=1:4. Find sum of A+B+C+D.
- 130kg
- 128kg
- 132kg
- 136kg
Correct answer: 130kg
Solution
A+B+C=114, A+B=50 → C=64. D:C=1:4 → D=16. B+D=56 → B=40. A=50-40=10. Total=10+40+64+16=130kg.
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