2022 SJI P2 Q3

2022 SJI P2 Q3

IB Year 5 | Grade 11
7 marks

A classroom has 12 seats, as shown in the diagram below.

Find the number of seating arrangements for Johnston and his 11 classmates if

  1. there are no restrictions;[1]
  2. Johnston wants to sit in Row 1;[2]
  3. two of his classmates Samson and Jackson must not sit next to each other in the same row.[4]

Solution:

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Answer:(a) \(479001600\) (b) \(159667200\) (c) \(413683200\)

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