Question: In this question: The drying rate in an industrial process is dependent on many factors and varies according to the following distribution. Minutes Relative Frequency

In this question:

The drying rate in an industrial process is dependent on many factors and varies according to the following distribution.

Minutes Relative Frequency
3 0.14
4 0.3
5 0.27
6 0.18
7 0.11

The answer shown here is 4.82 minutes, however, I get 5 minutes. Would like to know what am I doing wrong.

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