Venn Diagram Worksheet for Maths Olympiad

Maths Olympiad topic 32: Venn diagrams and inclusion–exclusion · Set 34 · 40 questions

How to solve it (Do not count twice): n(A or B) = n(A) + n(B) − n(both) — otherwise the “both” group is counted twice. Only A = n(A) − n(both). Neither = total − n(A or B). Both = n(A) + n(B) − n(A or B).

1. 1.In a class of 30 children, 17 like tea, 12 like coffee and 9 like both. How many like only tea? (a) 8 (b) 18 (c) 3 (d) 17
2. 2.In a class of 43 children, 25 like dance, 15 like music and 7 like both. How many like only dance? (a) 28 (b) 18 (c) 25 (d) 8
3. 3.In a class of 34 children, 24 like tea, 16 like coffee and 10 like both. How many like only tea? (a) 18 (b) 24 (c) 14 (d) 6
4. 4.In a class of 41 children, 17 like tea, 22 like coffee and 4 like both. How many like at least one of the two? (a) 31 (b) 39 (c) 35 (d) 41
5. 5.In a class of 37 children, 13 like cricket, 17 like football and 2 like both. How many like at least one of the two? (a) 28 (b) 30 (c) 26 (d) 37
6. 6.In a class of 37 children, 25 like tea, 15 like coffee and 9 like both. How many like only tea? (a) 22 (b) 6 (c) 25 (d) 16
7. 7.In a class of 40 children, 16 like tea, 20 like coffee and 4 like both. How many like only tea? (a) 20 (b) 4 (c) 12 (d) 16
8. 8.In a class of 29 children, 20 like cricket, 6 like football and 3 like both. How many like neither? (a) 6 (b) 3 (c) 7 (d) 9
9. 9.In a class of 37 children, 18 like cricket, 30 like football and 12 like both. How many like only cricket? (a) 7 (b) 6 (c) 18 (d) 12
10. 10.In a class of 26 children, 17 like maths, 11 like science and 6 like both. How many like only maths? (a) 15 (b) 5 (c) 17 (d) 11
11. 11.In a class of 21 children, 13 like tea, 8 like coffee and 4 like both. How many like at least one of the two? (a) 17 (b) 13 (c) 21 (d) 18
12. 12.In a class of 44 children, 24 like mangoes, 25 like bananas and 12 like both. How many like only mangoes? (a) 19 (b) 24 (c) 12 (d) 13
13. 13.In a class of 33 children, 20 like mangoes, 12 like bananas and 6 like both. How many like neither? (a) 1 (b) 13 (c) 6 (d) 7
14. 14.In a class of 49 children, 28 like cricket, 29 like football and 9 like both. How many like only cricket? (a) 9 (b) 19 (c) 20 (d) 28
15. 15.In a class of 41 children, 21 like mangoes, 22 like bananas and 12 like both. How many like only mangoes? (a) 10 (b) 19 (c) 21 (d) 9
16. 16.In a class of 41 children, 20 like dance, 22 like music and 10 like both. How many like neither? (a) 10 (b) 19 (c) 8 (d) 9
17. 17.In a class of 36 children, 14 like dance, 24 like music and 6 like both. How many like only dance? (a) 14 (b) 18 (c) 8 (d) 12
18. 18.In a class of 29 children, 18 like tea, 12 like coffee and 5 like both. How many like only tea? (a) 7 (b) 13 (c) 18 (d) 17
19. 19.In a class of 37 children, 23 like dance, 12 like music and 10 like neither. How many like both? (a) 10 (b) 8 (c) 27 (d) 9
20. 20.In a class of 30 children, 23 like tea, 10 like coffee and 7 like both. How many like only tea? (a) 20 (b) 23 (c) 3 (d) 16
21. 21.In a class of 21 children, 8 like maths, 8 like science and 4 like both. How many like at least one of the two? (a) 16 (b) 12 (c) 8 (d) 21
22. 22.In a class of 44 children, 22 like dance, 21 like music and 3 like both. How many like neither? (a) 1 (b) 3 (c) 4 (d) 7
23. 23.In a class of 32 children, 15 like cricket, 23 like football and 12 like both. How many like only cricket? (a) 15 (b) 9 (c) 3 (d) 11
24. 24.In a class of 14 children, 7 like maths, 8 like science and 3 like both. How many like only maths? (a) 5 (b) 6 (c) 7 (d) 4
25. 25.In a class of 27 children, 19 like mangoes, 15 like bananas and 12 like both. How many like neither? (a) 5 (b) 12 (c) 6 (d) 17
26. 26.In a class of 33 children, 9 like tea, 21 like coffee and 4 like both. How many like only tea? (a) 12 (b) 5 (c) 17 (d) 9
27. 27.In a class of 45 children, 22 like dance, 18 like music and 7 like neither. How many like both? (a) 38 (b) 2 (c) 7 (d) 3
28. 28.In a class of 22 children, 15 like maths, 16 like science and 3 like neither. How many like both? (a) 12 (b) 3 (c) 19 (d) 9
29. 29.In a class of 32 children, 12 like dance, 22 like music and 7 like both. How many like at least one of the two? (a) 32 (b) 20 (c) 34 (d) 27
30. 30.In a class of 38 children, 21 like cricket, 23 like football and 9 like both. How many like at least one of the two? (a) 44 (b) 35 (c) 38 (d) 26
31. 31.In a class of 42 children, 13 like mangoes, 28 like bananas and 9 like both. How many like only mangoes? (a) 19 (b) 4 (c) 14 (d) 13
32. 32.In a class of 35 children, 14 like maths, 26 like science and 11 like both. How many like at least one of the two? (a) 29 (b) 40 (c) 35 (d) 18
33. 33.In a class of 31 children, 8 like dance, 17 like music and 2 like both. How many like only dance? (a) 6 (b) 15 (c) 14 (d) 8
34. 34.In a class of 51 children, 28 like maths, 24 like science and 9 like neither. How many like both? (a) 1 (b) 9 (c) 42 (d) 10
35. 35.In a class of 32 children, 13 like maths, 27 like science and 2 like neither. How many like both? (a) 30 (b) 8 (c) 10 (d) 2
36. 36.In a class of 32 children, 19 like maths, 15 like science and 3 like both. How many like neither? (a) 4 (b) 3 (c) 2 (d) 1
37. 37.In a class of 29 children, 20 like cricket, 6 like football and 2 like both. How many like at least one of the two? (a) 24 (b) 29 (c) 22 (d) 26
38. 38.In a class of 31 children, 14 like dance, 17 like music and 8 like both. How many like at least one of the two? (a) 23 (b) 24 (c) 15 (d) 31
39. 39.In a class of 42 children, 21 like dance, 13 like music and 2 like both. How many like neither? (a) 2 (b) 10 (c) 8 (d) 12
40. 40.In a class of 45 children, 27 like tea, 25 like coffee and 12 like both. How many like neither? (a) 17 (b) 12 (c) 5 (d) 6

Free maths olympiad lessons, practice and worksheets at talentjr.in/maths-olympiad