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1). 42 kg2). 43.6 kg3). 45 kg4). 49 kg |
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Answer» As per given data - Average weights of three CLASSES of 58, 56 & 59 students respectively is 45, 50, 52 kg. Total weights of students = $(\sum \left( {average\;weight\; \times \;NUMBER\;of\;students\;of\;each\;class} \right))$ Total weights of students = 58 × 45 + 56 × 50 + 59 × 52 Total weights of students = 2610 + 2800 + 3068 Total weights of students = 8478 Here total number of students = 58 + 56 + 59 Total number of students = 173 Average weight of students = Total weight/Number of students Average weight of students = 8478/173 = 49.005 |
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