Question
PSLE
The average height of a group of boys was 125.1 cm. When Mr Chan measured and recorded the height of these boys, he wrongly recorded one child's height as 125 cm when it should have been 152 cm. As a result, Mr Chan calculated the average height as 122.1 cm. How many boys were there in the group?
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PSLE
The average height of a group of boys was 125.1 cm. When Mr Chan measured and recorded the height of these boys, he wrongly recorded one child's height as 125 cm when it should have been 152 cm. As a result, Mr Chan calculated the average height as 122.1 cm. How many boys were there in the group?