Answer:
4/21
Step-by-step explanation:
21 total computers and only 4 work so 4/21 probablity
There is evidence of non-response bias in the survey results because only a fraction of the people that were mailed responded.
<h3>What is a survey?</h3>
A survey is a type of research which seeks to obtain information from a specific group of people called respondents. The research is normally in form of a questionnaire the reflects the honest opinion of the respondent.
From the result of the survey, it is possible to conclude that there is evidence of non-response bias in the survey results because only a fraction of the people that were mailed responded.
Learn more about survey: brainly.com/question/13532910
5 hours = 330 bagels to find how many in 1 hours divide by 5 1 hour = 66 bagels then do 66 x 13 = 858 so in 13 hours they bake 858 bagels