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6 January, 21:25

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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Answers (2)
  1. 6 January, 22:17
    0
    Average=mean

    Mean = sum of scores divided by number of scores

    50 responders spend 45 minutes

    The others spend 30 minutes

    75-50 = 25

    So, 25 responders spend 30 minutes

    50*45+25*30 divided by 75 (because 75 is the total number of responders)

    Which equals to 40 minutes
  2. 7 January, 00:25
    0
    D. 40 minutes
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