[" 127.A man invites a party to "(m+n)" ...

[" 127.A man invites a party to "(m+n)" friends to dinner and "],[" places "m" at one round table and "n" at another.The number "],[" of ways of arranging the guests,is "],[[" (a) "((m+n)!)/(m!n!)," (b) "((m+n)!)/((m-1)!(n-1)!)]]

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[" 127.A man invites a party to "(m+n)" friends to dinner and "],[" places "m" at one round table and "n" at another.The number "],[" of ways of arranging the guests,is "],[[" (a) "((m+n)!)/(m!n!)," (b) "((m+n)!)/((m-1)!(n-1)!)]]

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