How do u write 668 to 900 using ones, tens and hundreds

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent and the median? 40 25 8 36 18 15 24 27 43 9 12 19 22 34 31 20 26 19 17 28

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?

Which will form a composite function?