Question
PSLE
The average height of a group of students was 127.9 cm. When Mr Toh measured and recorded the height of these students, he wrongly recorded one child's height as 140 cm when it should have been 104 cm. As a result, Mr Toh calculated the average height as 130.9 cm. How many students were there in the group?
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PSLE
The average height of a group of students was 127.9 cm. When Mr Toh measured and recorded the height of these students, he wrongly recorded one child's height as 140 cm when it should have been 104 cm. As a result, Mr Toh calculated the average height as 130.9 cm. How many students were there in the group?