SOLUTION: THere are 10 pictures available to place on exhibit in a museum. How many arrangements (permutations) are possible if 7 pictures are selected at a time?

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Question 113279This question is from textbook
: THere are 10 pictures available to place on exhibit in a museum. How many arrangements (permutations) are possible if 7 pictures are selected at a time? This question is from textbook

Answer by SHUgrad05(58) About Me  (Show Source):
You can put this solution on YOUR website!
nPr where n=total number of objects and r=number of objects chosen at once.
nPr=10P7=10*9*8*7*6*5*4=604,800