In a survey that asked about 75 people about their fitness schedules, 50 of the respondents said they spent an average of 45 min

Question

3 years ago

11

In a survey that asked about 75 people about their fitness schedules, 50 of the respondents said they spent an average of 45 min

utes 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

Mathematics

2 answers:

tresset_1 [31] · Answer 1 · 2022-02-21T19:35:13+03:00

tresset_1 [31]3 years ago

5 0

Answer:

D. 40 minutes

Step-by-step explanation:

levacccp [35] · Answer 2 · 2022-02-21T21:42:32+03:00

levacccp [35]3 years ago

4 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