Mathematics, 18.08.2021 21:30 cindykulei3719

The average height of a group of boys was 123 centremetre. After one girl whose height was 137centremetre joined the group, the average height of the group became 125 centremetre. Find the number of boys in the group.

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The average height of a group of boys was 123 centremetre. After one girl whose height was 137centre...

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