Answer:
The 50_59 range
Step-by-step explanation:
0-9 range: 9-0 = 9
9×16 (number of trees) = 144
10-19 range: 19-10=9
9 ×6= 54
20-29 range: 9×6 = 54
30-39 range: 9×10= 90
40-49 range: 9×14= 144
50-59 range: 9×4 = 36
Therefore, The range 50-59 occurs least frequently because it has the lowest number of all of them(36).