O-LevelMathematicsNumber4024/21 · May/June 2021 · Q57 Marks
Shade the subset A'∩B∩C. [Figure 5.1]
- (a)Shade the subset A'∩B∩C. [Figure 5.1][1]
- (b)(i)E = { A, C, E, G, H, J, N, R, T, Z } W = { x : x has rotational symmetry of order 2 } X = { x : x has line symmetry } Y = { R, A, N, G, E } Complete the Venn diagram. [Figure 5.2][3]
- (b)(ii)List the elements of X∩(WUY)'.[1]
- (b)(iii)Find n(WUXUY)'.[1]
- (b)(iv)Using set notation, complete this statement. Ø[1]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (May/June 2021). The mark or mark type is shown in brackets.
- [1] Shaded as in diagram (the region common to B and C, but outside A)
- [3] B2 for Venn diagram with 1 or 2 errors, omissions or repeats
- [3] or B1 for Venn diagram with 3 or 4 errors, omissions or repeats
- [1] C, T
- [1] 1
- [1] W ∩ X ∩ Y oe
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