120 psychology students took a standardized test. The scores are summarized in the GFDT below. Scores Frequency 100 - 109 13 110 - 119 17 120 - 129 16 130 - 139 13 140 - 149 14 150 - 159 47 The scores are also described in the cumulative table shown below. Scores Frequency less than 110 13 less than 120 30 less than 130 46 less than 140 less than 150 73 less than 160 - 120 What is the missing value in the cumulative GFDT? answer =