A shopping centre owner conducts a survey and asks customers about the importance of having a children's play area. The pie chart shows the results of the survey. a) The average number of visitors to this shopping centre each year is 684 720 Estimate the number of visitors that think having a children's play area is important. Assume that the sample is representative of the visitors. Optional working I No opinion 961 Answer Nct important Important 2219 ​