Official papers

Official 2023 Paper 2 · Q13

Paper 2Logic & proof

Let xx be a real number.

Which one of the following statements is a sufficient condition for exactly three of the other four statements?

Ax≥0x\ge0
Bx=1x=1
Cx=0x=0 or x=1x=1
Dx≥0x\ge0 or x≤1x\le1
Ex≥0x\ge0 and x≤1x\le1

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