如此写下2X2表,你会发现什么?
如果记下:考的是5题,没考的是N题,猜考10题,猜没考的是N-5题
所有跟帖:
• 2X2 -壮士- ♂ (15 bytes) () 10/25/2012 postreply 14:30:54
• when N is very big, N/(N+5) is close to 1, then your is correct -linda2- ♀ (416 bytes) () 10/25/2012 postreply 14:52:48
• 2X2 -壮士- ♂ (15 bytes) () 10/25/2012 postreply 14:30:54
• when N is very big, N/(N+5) is close to 1, then your is correct -linda2- ♀ (416 bytes) () 10/25/2012 postreply 14:52:48