Question
PSLE
The average height of a group of boys was 143.4 cm. When Mr Yeo measured and recorded the height of these boys, he wrongly recorded one child's height as 170 cm when it should have been 107 cm. As a result, Mr Yeo calculated the average height as 150.4 cm. How many boys were there in the group?
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PSLE
The average height of a group of boys was 143.4 cm. When Mr Yeo measured and recorded the height of these boys, he wrongly recorded one child's height as 170 cm when it should have been 107 cm. As a result, Mr Yeo calculated the average height as 150.4 cm. How many boys were there in the group?