Q. 45.0( 4 Votes )

The table below shows children in a class sorted according to their weights.



The mean weight is calculated as 26 kilograms. How many children have weights between 23 and 25 kilograms?





Answer :

Given: mean weight = 26 Kg

Let the unknown weight is x.



Mean age of child = Total age/ total number of children



560 + 24x = 26(21 + x)


560 + 24x = 546 + 26x


560 - 546 = 26x – 24x


14 = 2x


x = 7


children have weights between 23 and 25 kilograms = 7


Total number of questions = 12


How much each question will cost?


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