(爬梯数学)参加爬梯的30人中,有20个熟人相互均认识,剩下的10个生人则不认识任何别人。熟人相见抱抱,生人见任何人则握手。试问握手的总数比抱抱的总数多出多少?
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(爬梯数学)参加爬梯的30人中,有20个熟人相互均认识,剩下的10个生人则不认识任何别人。熟人相见抱抱,生人见任何人则握手。试问握手的总数比抱抱的总数多出多少?
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