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The average weight of 25 students of group A of a class is 51 kg. Whereas average weight of 35 students of group B is 54 kg. Find the average weight of 60 students of this class. |
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Answer» Average weight of 25 students of group A = 51 kg Thus, total of weight of 25 students W1 = 51 x 25 = 1275 kg Average weight of 35 students of group B = 54 kg Thus, sum of weight of 35 students, W2 = 54 x 35 = 1890 kg ∴ Average weight of 60 students of class = \(\frac { { W }_{ 1 }+{ W }_{ 2 } }{ 60 } \) = \(\frac { 1275+1890 }{ 60 } =\frac { 3165 }{ 60 } \) = 52.75 kg Thus, average wt. of 60 students = 52.75 kg |
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