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The mean (average) height of a group of children would be increased by 6 cm if 12 of the children in the group were each 8 cm taller. How many children are in the group?

 Nov 22, 2022
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Let the number of children==C
Let the mean height of all children==100 cm


100C==sum of the heights of all kids


[100C + (12*8)] / C ==100 + 6, solve for C


C==16 children

 Nov 22, 2022

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