Question
PSLE
The average height of a group of pupils was 130.7 cm. When Mr Sim measured and recorded the height of these pupils, he wrongly recorded one child's height as 135 cm when it should have been 153 cm. As a result, Mr Sim calculated the average height as 127.7 cm. How many pupils were there in the group?
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PSLE
The average height of a group of pupils was 130.7 cm. When Mr Sim measured and recorded the height of these pupils, he wrongly recorded one child's height as 135 cm when it should have been 153 cm. As a result, Mr Sim calculated the average height as 127.7 cm. How many pupils were there in the group?