Question
PSLE
The average height of a group of girls was 154.3 cm. When Mr Yeo measured and recorded the height of these girls, he wrongly recorded one child's height as 195 cm when it should have been 159 cm. As a result, Mr Yeo calculated the average height as 157.3 cm. How many girls were there in the group?
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PSLE
The average height of a group of girls was 154.3 cm. When Mr Yeo measured and recorded the height of these girls, he wrongly recorded one child's height as 195 cm when it should have been 159 cm. As a result, Mr Yeo calculated the average height as 157.3 cm. How many girls were there in the group?