Give the mode for following GFDT. (Recall, there is a definition for the mode appropriate for GFDTs.)

Data	Frequency
30 - 34	11
35 - 39	23
40 - 44	10
45 - 49	8
35 - 39	7
55 - 59	3
60 - 64	4
65 - 69	1
70 - 74	1

mode =