anonymous
  • anonymous
An art gallery has 8 new paintings, all the same size, but enough room on the wall for only 6 of them. How many ways can the director arrange the 8 paintings on the wall? A. 48 B. 28 C. 20,160 D. 40,320
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
anonymous
  • anonymous
I think so. You did 8P6?
anonymous
  • anonymous
yea and one sec let me try to explain what i think

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anonymous
  • anonymous
8! / 6!*(8-6)! = 28 So there are 28 ways in which 6 paintings may be chosen from 8. Each of those 28 can be arranged in 6*5*4*3*2 (720) ways. So the total number of arrangements is 28 * 720 20,160 answer is C
anonymous
  • anonymous
solid :) seems like you have this down!
anonymous
  • anonymous
i just needed to be sure thanks. :DD
anonymous
  • anonymous
np

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