tongxun. I got it now. it's again some old fomulars that I don't remember. but did the problem (Q28) imply that 140 cards are distributed evenly to m (m>=2) people? I guess that was my early confusion. Thanks anyway.
pgclt: your question
but did the problem (Q28) imply that but did the problem (Q28) imply that 140 cards are distributed evenly to m (m>=2) people?
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I think that 140 cards are distributed evenly to m (m>=2) people。