Complete Question:
The average weight of the 36 children in the group was 55 kgs. 5 children of average weight 53 kgs left the group. What was the new average weight of the group in kg?
Answer:
The new average weight of the group = 1,715/31 = 55.32 kgs
Explanation:
Average weight of 36 children = 55 kgs
Total weight of 36 children = 1,980 (36 * 55) kgs
Average weight of 5 children = 53 kgs
Total weight of 5 children = 265 (53 * 5) kgs
When 5 children of 53 kgs average weight left the group,
the remaining 31 children (36 - 5) had total weight = 1,715 (1,980 - 265)
Therefore, the new average weight for 31 children at a total of 1,715, will be
= 1,715/31
= 55.32 kgs
