Question
PSLE
The average height of a group of children was 120.2 cm. When Mr Goh measured and recorded the height of these children, he wrongly recorded one child's height as 157 cm when it should have been 175 cm. As a result, Mr Goh calculated the average height as 117.2 cm. How many children were there in the group?
2 m

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PSLE
The average height of a group of children was 120.2 cm. When Mr Goh measured and recorded the height of these children, he wrongly recorded one child's height as 157 cm when it should have been 175 cm. As a result, Mr Goh calculated the average height as 117.2 cm. How many children were there in the group?