Twelve chairs in two colours are arranged, as shown. Find in how many ways nine people can
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Twelve chairs in two colours are arranged, as shown.
Find in how many ways nine people can sit on these chairs if:
a. The two blue chairs in column C must remain unoccupied
b. All of the green chairs must be occupied
c. More blue chairs than green chairs must be occupied
d. At least one of the chairs in row 2 must remain unoccupied.
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Related Book For
Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook
ISBN: 9781108407304
1st Edition
Authors: Dean Chalmers, Julian Gilbey
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