Question
PSLE
The average height of a group of students was 153.2 cm. When Mr Kong measured and recorded the height of these students, he wrongly recorded one child's height as 105 cm when it should have been 150 cm. As a result, Mr Kong calculated the average height as 150.2 cm. How many students were there in the group?
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PSLE
The average height of a group of students was 153.2 cm. When Mr Kong measured and recorded the height of these students, he wrongly recorded one child's height as 105 cm when it should have been 150 cm. As a result, Mr Kong calculated the average height as 150.2 cm. How many students were there in the group?