Mathematics · JCE / Sets Multiple choiceExerciseForm 3 · JCE If n(A) = 12, n(B) = 9 and n(A ∩ B) = 4, what is n(A ∪ B)? A21B25C13D17 Check my answer Source: Thuto360 JCE practice Report a problemWhat's wrong?The marked answer is wrongThe question is unclearA spelling or typing mistakeThe picture is wrong or missingSomething elseAnything to addSend More like thisIn a class of 30, 18 play football, 15 play netball and 5 play both. How many play neither?Multiple choiceJCESetsA = {1, 2, 3, 4} and B = {3, 4, 5}. What is A ∩ B?Multiple choiceJCESetsIn a class of 40 pupils, 25 play football, 18 play netball and 7 play neither.StructuredJCESets
