15 A professor had students keep track of their social interactions for a week. The number of social interactions over the week is shown in the following grouped frequency distribution. Identify the lower limit of the tenth class. Number of Social Interactions Frequency 25​-29 9 30​-34 16 35​-39 18 40​-44 19 45​-49 15 50​-54 11 55​-59 4 60​-64 8 65​-69 0 70​-74 4 Lower limit  of the tenth class : ________.

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A professor had students keep track of their social interactions for a week. The number of social interactions over the week is shown in the following grouped frequency distribution. Identify the lower limit of the tenth class.

Number of Social Interactions
Frequency
25​-29
9
30​-34
16
35​-39
18
40​-44
19
45​-49
15
50​-54
11
55​-59
4
60​-64
8
65​-69
0
70​-74
4

Lower limit  of the tenth class : ________.

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