Question
PSLE
The average height of a group of students was 139.6 cm. When Mr Gan measured and recorded the height of these students, he wrongly recorded one child's height as 162 cm when it should have been 126 cm. As a result, Mr Gan calculated the average height as 142.6 cm. How many students were there in the group?
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PSLE
The average height of a group of students was 139.6 cm. When Mr Gan measured and recorded the height of these students, he wrongly recorded one child's height as 162 cm when it should have been 126 cm. As a result, Mr Gan calculated the average height as 142.6 cm. How many students were there in the group?