In a survey that asked about 75 people about their fitness schedules, 50 of the respondents said they spent an average of 45 minutes a day exercising. The rest said they spent an average of 30 minutes a day exercising.
What is the average time spent exercising by all the respondents?
A. 42 minutes
B. 33 minutes
C. 38 minutes
D. 40 minutes
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