The average height of 20 boys is 120cm and the average height of 10 girls is 117 cm.Find the average height of these 30 students.
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Mar 14, 2018 - The average height of 20 boys is 120cm and the average height of 10 girls is 117 cm. find the average height of these 30 students
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120+117/30=237/2=118.5 cm
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