Question

开始→x＝6→y＝x－1→输出y→x＝14?是→结束,否→重回y＝x－1

Answer 1

A={6,8,10,12,14} B={5,7,9,11,13}

P=1/5*1/5+1/5*2/5+1/5*3/5+1/5*4/5+1/5*1=3/5