2026 PCSS P1 Q15

2026 PCSS P1 Q15

Secondary 4
4 marks
  1. \(\xi=\{x:x\text{ is an integer},\ 11<x<21\}\)
    \(A=\{x:x\text{ is an odd number}\hspace{0.15em}\}\)
    \(B=\{x:x\text{ is a multiple of}\hspace{0.5em}3\}\)
    1. List the elements of Set A and of Set B.
      \(A=\{\ \ldots\ \}\)[1]
      \(B=\{\ \ldots\ \}\)[1]
    2. Find \(n(A^{\prime}\cap B)\).[1]
  2. On the Venn Diagram below, shade the set \(A\cap B^{\prime}\).[1]

Solution:

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Answer:(a)(i) \(A=\{13,15,17,19\}\), \(B=\{12,15,18\}\) (ii) 2 (b) A-only region shaded

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