There are 90 pencils, 40 rulers and 50 exercise books, and the average award is given to the "outstanding young pioneers" selected by the fifth grade. As a result, there are 5 more pencils, 6 more rulers, and 1 exercise book. How many people are selected as "Excellent Young Pioneers" in the fifth grade?
有90支铅笔，40把尺子和50本练习本，平均奖给五年级评选出的"优秀少先队员"，结果铅笔多出5支，尺子多出6把，练习本还差1本．求五年级评选出"优秀少先队员"多少人？
<result>17</result>