阅读理解, 根据短文内容，判断正确还是错误。

Bill and Kate are school students. They are Young Pioneers. They are in Grade Three. There are six classes in Grade Six. In Kate's class there are forty-two students. Twenty-five students are girls. There are forty-five students in Bill's class. Twenty students are boys. And there are thirty-four Young Pioneers in Bill's class. In Kate's class there are thirty.