有100张卡片(从1号到100号),从中任取一张,取到的卡号是7的倍数的概率为( )
①
img class=kfformula src=zzximg/20190809/1565330760695228.png data-latex=\frac {7} {50} width=75 height=53/
②
img class=kfformula src=zzximg/20190809/1565330760716247.png data-latex=\frac {7} {100} width=76 height=53/
③
img class=kfformula src=zzximg/20190809/1565330760831846.png data-latex=\frac {7} {48} width=68 height=53/
④
img class=kfformula src=zzximg/20190809/1565330760810107.png data-latex=\frac {3} {20} width=68 height=53/