Question
PSLE
The average height of a group of boys was 148.1 cm. When Mr Song measured and recorded the height of these boys, he wrongly recorded one child's height as 127 cm when it should have been 172 cm. As a result, Mr Song calculated the average height as 143.1 cm. How many boys were there in the group?
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PSLE
The average height of a group of boys was 148.1 cm. When Mr Song measured and recorded the height of these boys, he wrongly recorded one child's height as 127 cm when it should have been 172 cm. As a result, Mr Song calculated the average height as 143.1 cm. How many boys were there in the group?