Two students from a group of 8 boys and 12 girls are present the school in a praise if the students are chose at Rendón what’s the probability that the students chose are not both girls

Suppose you are analyzing the relationship between time and distance given in a table,and there are 4 values for each quantity.you divide distance 2 minus distance 1 by time 2 minus time 1.you then divide distance 4 minus distance 3 by time 4 minus time 3 and get a different answer.what can you say about the relationship?