Question
PSLE
The average height of a group of pupils was 146.9 cm. When Mr Tay measured and recorded the height of these pupils, he wrongly recorded one child's height as 139 cm when it should have been 193 cm. As a result, Mr Tay calculated the average height as 140.9 cm. How many pupils were there in the group?
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PSLE
The average height of a group of pupils was 146.9 cm. When Mr Tay measured and recorded the height of these pupils, he wrongly recorded one child's height as 139 cm when it should have been 193 cm. As a result, Mr Tay calculated the average height as 140.9 cm. How many pupils were there in the group?