Question
PSLE
The average height of a group of students was 147.5 cm. When Mr Chiam measured and recorded the height of these students, he wrongly recorded one child's height as 195 cm when it should have been 159 cm. As a result, Mr Chiam calculated the average height as 151.5 cm. How many students were there in the group?
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PSLE
The average height of a group of students was 147.5 cm. When Mr Chiam measured and recorded the height of these students, he wrongly recorded one child's height as 195 cm when it should have been 159 cm. As a result, Mr Chiam calculated the average height as 151.5 cm. How many students were there in the group?