There are four types of weights, namely 1 kg, 2 kg, 5 kg and 10 kg. What is the maximum number of ways one can measure 20 kg, if at least eight but not more than eleven weights of 1 kg are to be used while measuring?

उत्तर देखें और व्याख्या

उत्तर: (B) 8

व्याख्या

With 8 one-kg weights, 12 kg from 2, 5, 10: 3 ways. With 9: 11 kg: 1 way. With 10: 10 kg: 3 ways. With 11: 9 kg: 1 way. Total 8.