首先,在A1单元格输入:=Int(rand()*100)+1
A2输入:=IF($A$1>=90,INT(RAND()*20)+60,IF($A$1>25,INT(RAND()*10)+80,INT(RAND()*10)+90))
=IF(RAND()<10%,RANDBETWEEN(60,80),IF(RAND()<25%,RANDBETWEEN(90,100),RANDBETWEEN(80,90)))
=choose(lookup(rand(),{0;0.1;0.3;0.5;0.6;0.75},{1;2;3;4;5;6}),11,12,13,14,15,16)
但是概率不同于比例,存在这种概率不代表一定会出现。
一共20个数?