Question

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

Answer 1

129 cm

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