1. taking 1 weight at a time -->Total weight=15/8
2. Taking 2 at a time (6 cases)---> Total weight = 45/8(by adding up all possible 2 at a time selections)
3. similarly for 3 at a time(4cases) = T.W=45/8
4. All four at a time --->TW=15/8
Total = (15+45+45+15)8 = 15 KG
Moderation Team
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