O-LevelMathematicsNumber4024/12 · Oct/Nov 2018 · Q224 Marks
E = { 0, 1, 2, 3, 4, 5, 6 } P = { x : x = 0, 1, 2 } Q = { y : y = 0, 2 }
- (a)List the members of P ∩ Q.[1]
- (b)Find n(P' ∪ Q).[1]
- (c)R = { z : z = 2x + y, x ∈ P, y ∈ Q } List the members of R.[2]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2018). The mark or mark type is shown in brackets.
- [1] 0, 2
- [1] 6
- [2] 0, 2, 4, 6
- B1 for 0, 2, 4, 6 plus extras (e.g. repeated 2 or 4; or an 8)
- or B1 for three of 0, 2, 4, 6 with no extras.
- or M1 for 2x + y clearly seen correctly evaluated for two or more valid values of x and y
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