Question
PSLE
The average height of a group of boys was 159.2 cm. When Mr Thia measured and recorded the height of these boys, he wrongly recorded one child's height as 105 cm when it should have been 150 cm. As a result, Mr Thia calculated the average height as 156.2 cm. How many boys were there in the group?
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PSLE
The average height of a group of boys was 159.2 cm. When Mr Thia measured and recorded the height of these boys, he wrongly recorded one child's height as 105 cm when it should have been 150 cm. As a result, Mr Thia calculated the average height as 156.2 cm. How many boys were there in the group?