find the total number of ways to put 7 identical apples into 4 identical packages so that each package has at least one apple?
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Step-by-step explanation:
n = 7
r = 4
nPr =
=> n!/(n-r)!
=> 7!/(7-4)!
=> 7×6×5×4×3!/3!
=> 7×6×5×4
=> 840
Hence, the number of ways is 840
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