The number of the first question is ABCD, where the number of people in position A is 4, position B is 3, position C is 2, and position D is 1, so there are 4 * * * 2 * 1 = 24 methods;

The second question is divided into three situations. A is that only one girl and two boys go to the meeting, so eight have two boys and six have one girl (6)×(8*7/2)= 168. B There are two girls and a boy going to the meeting, and then there is a boy from eight and two girls from six. There are similar 120 kinds.