Question
PSLE
The average height of a group of children was 137.1 cm. When Mr Lin measured and recorded the height of these children, he wrongly recorded one child's height as 193 cm when it should have been 139 cm. As a result, Mr Lin calculated the average height as 143.1 cm. How many children were there in the group?
2 m

Click button first when a symbol is required. X

PSLE
The average height of a group of children was 137.1 cm. When Mr Lin measured and recorded the height of these children, he wrongly recorded one child's height as 193 cm when it should have been 139 cm. As a result, Mr Lin calculated the average height as 143.1 cm. How many children were there in the group?