一组数据3,4,5,6,7,7,7,7,8,9,这组数据的中位数是 ,众数是 .
20÷( )== (小数)= %= 折.
=18: = :20== ÷40.
: =15÷ == (填小数).
= : ==6÷ .
0.6==18÷ = :10= %