In a survey, each student chose their favourite day of the week. In the graph, the percentages of those surveyed who selected each day of the week is shown.
If 3000 students were surveyed, how many people chose Friday as their favourite day of the week?
Pick one
Solution
Reading from the graph, 20% of the students surveyed chose Friday. Since 3000 students were surveyed, the number of students who chose Friday as their favourite day of the week was 10020×3000=20×30=600.
Want a route through all this instead of an archive? The track
puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.
