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The average weight of 3 persons of group A is 60 kg, the average weight of 2 other persons of Group B is 70 kg, then find out the average weight of all persons.`1. 40 kg2. 54 kg3. 64 kg4. 70 kg |
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Answer» Correct Answer - Option 3 : 64 kg GIven : The average weight of 3 persons of group A is 60 kg The average weight of 2 persons of Group B is 70 kg Formula used : Average = Total sum of all quantities/total number of quantities Calculations : Total weight of group A people = 60 × 3 = 180 kg Total weight of group B people = 70 × 2 = 140 kg ⇒ Total weight = 140 + 180 = 320 kg ⇒ Average weight of all persons = 320/5 ⇒ 64 kg ∴ Average weight of all persons will be 64 kg |
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