Middle school students riding electric bikes to school has brought hidden dangers to traffic safety. In order to understand the attitude of 2,500 parents of students in a middle school to "middle school students riding electric bikes to school", 400 parents were randomly surveyed, and 360 parents were opposed to it. The following The correct statement is how many parents are in the sample
中学生骑电动车上学给交通安全带来了隐患，为了解某中学2500个学生家长对"中学生骑电动车上学"的态度，从中随机调查400个家长，结果有360个家长持反对态度，则下列说法正确的是样本是多少个家长
<result>360</result>