(a) In a school of 255 students, 80 of them study Arabic only and 125 study French only. Each student studies at least one of the two subjects

(i) Draw a Venn diagram to represent the information
(ii) How many students study
(a) both subjects?
(ß) French?

(b) Make h the subject of v = ⅓πr²h

(c) A bookseller bought 80 copies of books at GH¢ 3.50 per copy. He sold each of them at GH¢ 4.20. Find
(i) the total cost price
(ii) his percentage profit