A certain school selects some students to participate in a composition competition, and there are 10 more male students than female students. As a result of the selection, 50% of female students won awards, and 30% of male students won awards. The total number of awardees was 27. How many female students participated in the composition competition?
某校选出一些同学参加作文竞赛，其中男同学比女同学多10人．评选结果，女同学有50%获奖，男同学有30%获奖，获奖总人数共27人．参加作文竞赛的女同学有多少人．
<result>30</result>