Higher January 2020 Paper 1R Q4
4 \(B = \{\text{b, l, u, e}\}\)
\(G = \{\text{g, r, e, y}\}\)
\(W = \{\text{w, h, i, t, e}\}\)
(a) List all the members of the set
(i) \(B \cup G\)
(ii) \(W \cap G^{\prime}\)
(2)
Serena writes down the statement \(\;B \cap G \cap W = \varnothing\)
(b) Is Serena’s statement correct?
You must give a reason for your answer. (1)
You must give a reason for your answer. (1)
| Scheme | Marks |
|---|---|
| (i) b, l, u, e, g, r, y | B1 |
| (ii) w, h, i, t | B1 |
| (2) |
Notes
B1: No incorrect or repeats
B1: No incorrect or repeats
| Scheme | Marks |
|---|---|
| No with reason | B1 |
| (1) | |
| (3 marks) |
Notes
B1: eg ‘e is in all three sets’ OR ‘all three sets share a member’ OR \(B \cap G \cap W = \{\text{e}\}\) (with or without the braces)