 <translate> 60% of the students pay for the lunch because 100 - 40 = 60. 30 students pay for lunch because 50 x .6 = 30. These students pay $7 for their lunch because 210 / 30 = 7. The final answer: 7. <yor> 60% àwọn akẹ́kọ̀ọ́ ló ń sanwó oúnjẹ ọ̀sán nítorí pé 100 - 40 = 60. Àwọn akẹ́kọ̀ọ́ 30 ló ń sanwó oúnjẹ ọ̀sán nítorí pé 50 x.6 = 30. Àwọn akẹ́kọ̀ọ́ yìí san $7 fún oúnjẹ ọ̀sán wọn nítorí pé 210 / 30 = 7. Ìdáhùn tí wọ́n fún un níkẹyìn ni pé: 7. 