Correct Answer: 72.42 inches
Explanation:
Overall height = (n1a1 + n2a2) / (n1 + n2) n1= 20, a1 = 5 ft 11 inches = 5 x 12 + 11 = 71 inches n2= 18, a2 = 6 ft 2 inches = 6 x 12 + 2 = 74 inches∴ Overall height = [(20) (71) + (18) (74)] / (20+18) = (1420 + 1332) / 38 = 72.42 inches