Average weight of 10 children in a group was 42.5 kg. Two children of weight 56 kg and 45 kg
left the group. What would be the new average weight of that group ? *
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=> X = 57
Step-by-step explanation:
Let the average weight of the 59 students be X Therefore, the total weight of the 59 of them will be 59X
The questions states that when the weight of this student who left is added, the total weight of the class = 59X + 45
When this student is also included, the average weight decreases by 0.2 kgs
59X +
45604560
= X - 0.2
=> 59X + 45 = 60X - 12
=> 45 + 12 = 60X - 59X
=> X = 57
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