Use the frequency table to calculate the equal share value (mean) of the heights.
139+145+150+136+152+144+138
A 143.7
B 143.43
C 179.63
D 100.4
A quick method to calculate the mean (equal share value) is to add up all the values and then divide by the number of values.
Total height = 139 + 145 + 150 + 136 + 152 + 144 + 138 = 1004
Number of values = 7
Mean = Total height / Number of values = 1004 / 7 = 143.43
Therefore, the equal share value (mean) of the heights is 143.43.
The correct answer is B. 143.43.