There are 45 boys in class 2 of the sixth grade in a primary school in Jiujiang, with an average age of 14, and 47 girls with an average age of 15. What is the average age of the students in the class. (keep one decimal place)
九江某小学六年2班有男生45人，平均年龄14岁，女生47人，平均年龄15岁．全班学生平均年龄是多少岁．(保留一位小数)
<result>14.5</result>