David W. answered • 05/22/20
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4.7
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Experienced Prof
David H.
asked • 05/22/20An art gallery has 9 paintings to display along a hallway. How many different ways can they choose and display 6 of the paintings.
A. 4320
B. 40320
C 60,480
D.362,880
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2 Answers By Expert Tutors
Yefim S. answered • 05/22/20
Tutor
5
(20)
Math Tutor with Experience
Displays differ from each other only by order, so this number of permutations from 9 elenents by 9:
P(9,9) = 9! = 362880
Answer: D.
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David W.
But it is P(9,6).05/22/20