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15 December, 10:34

The average height of 4 children is 15h - 3 centimeters. Two more children with heights of 10h + 46 centimeters and 14h - 16 centimeters join the group. Find the average height of 6 children if h = 9

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  1. 15 December, 12:24
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    129 cm

    Step-by-step explanation:

    Average height of 4: 15 (9) - 3 = 132 cm

    Sum of 4 = 4 * average = 528 cm

    Sum of 6 = 528 + 136 + 110 = 774 cm

    Average of 6 = 774/6 = 129
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