Question
PSLE
The average height of a group of boys was 135.4 cm. When Mr Loo measured and recorded the height of these boys, he wrongly recorded one child's height as 193 cm when it should have been 139 cm. As a result, Mr Loo calculated the average height as 138.4 cm. How many boys were there in the group?
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PSLE
The average height of a group of boys was 135.4 cm. When Mr Loo measured and recorded the height of these boys, he wrongly recorded one child's height as 193 cm when it should have been 139 cm. As a result, Mr Loo calculated the average height as 138.4 cm. How many boys were there in the group?