Question
PSLE
The average height of a group of children was 153.4 cm. When Mr Tan measured and recorded the height of these children, he wrongly recorded one child's height as 195 cm when it should have been 159 cm. As a result, Mr Tan calculated the average height as 156.4 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 153.4 cm. When Mr Tan measured and recorded the height of these children, he wrongly recorded one child's height as 195 cm when it should have been 159 cm. As a result, Mr Tan calculated the average height as 156.4 cm. How many children were there in the group?