A research organization is studying the selling price of laptop computers. They selected 25 different computers for the study. To summarize the selling price with a frequency distribution and using the 2k rule, how many classes would you recommend?
A.
10
B.
25
C.
4
D.
5
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【简答题】How old are the youngest schoolchildren learning Chinese?
【简答题】A.She is learning English and drama. B.She is learning how to teach minority students. C.She is learning how to make sound judgment. D.She is learning to perceive, not to judge.