投掷5次硬币,有4次正面朝上,1次反面朝上,那么,投掷第6次硬币一定是反面朝上. .
== %=40: = (填小数)
0.6== :10=4.5÷ = %
÷20=6÷8=== :4.
÷10=0.8= : == %
÷ =0.375== :32= %