Question
PSLE
The average height of a group of boys was 126.8 cm. When Mr Ong measured and recorded the height of these boys, he wrongly recorded one child's height as 104 cm when it should have been 140 cm. As a result, Mr Ong calculated the average height as 120.8 cm. How many boys were there in the group?
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PSLE
The average height of a group of boys was 126.8 cm. When Mr Ong measured and recorded the height of these boys, he wrongly recorded one child's height as 104 cm when it should have been 140 cm. As a result, Mr Ong calculated the average height as 120.8 cm. How many boys were there in the group?