题目

阅读理解Is Being Active Helpful for Better Grades?For some students, getting better grades can seem like an impossible task sometimes. With the challenges of school, just paying attention in class or studying hard isn't always enough. But what if there were other ways for students to improve their grades? For parents and students who have ever wondered if this is possible, now you can rest easy. Research suggests that a person who likes doing activities can improve their grades.Scientists think that those students who are active are not just exercising their bodies, but also exercising the（7分）体育文化用品商店购进篮球和排球共20个，进价和售价如表，全部销售完后共获利润260元．篮球排球进价（元/个）8050售价（元/个）9560（1）购进篮球和排球各多少个？（2）销售6个排球的利润与销售几个篮球的利润相等？