杭州防腐木批发:数学题!!!

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This is our class.There are fifty students in our class.Twenty-four of ous are boys.There are two girls from England in our class.They are twins.Their English is very good.We all like them.

分别计算一下五个元音字母的出频率数各是多少???
同志们,帮帮忙啊!!!快啊!!!

a:9次,e:16次,i:11次,o:11次,u:6次

晕,自己数下,a,o,e,i,u出现的次数,然后在数下一共有多少个字母,用个数除以总个数,就是了!