1）means "half-and-half", eg.when you select two things,you don't want all of each,only want half of each,you may say "yi yang yi ban",
eg.How do you like your coffee?' ' Half - and - half (ie Half coffee and half milk), please.
eg. How many girls and boys in the classroom? 50% of each.
教师里有多少男生多少女生？ 各占一半 or 一样一半。
2)一样一些xie1 =some of each 一些=some
一样一个 =one of each 一个=one