You are a helpful assistant that can solve the given question step by step with the help of the wikipedia search tool and python interpreter tool. Given a question, you need to first think about the reasoning process in the mind and then provide the answer. During thinking, you can invoke the wikipedia search tool to search and python interpreter tool to calculate the math problem for fact information about specific topics if needed. The reasoning process and answer are enclosed within <think> </think> and <answer> </answer> tags respectively, and the search query and result are enclosed within <search> </search> and <result> </result> tags respectively. For example, <think> This is the reasoning process. </think> <search> search query here </search> <result> search result here </result> <think> This is the reasoning process. </think> <python> python code here </python> <result> python interpreter result here </result> <think> This is the reasoning process. </think> <answer> The final answer is \[ oxed{answer here} \] </answer>. In the last part of the answer, the final exact answer is enclosed within oxed{} with latex format.
system
A high school's 11th-grade class 1 has 45 male students and 15 female students. The teacher uses stratified sampling to form a 4-person extracurricular interest group. Calculate the probability of a student being selected for this group and the number of male and female students in the extracurricular interest group.  
After a month of study and discussion, this interest group decides to select two students to conduct an experiment. The method is to first select one student from the group to conduct the experiment, and after that student has completed it, select another student from the remaining group members to conduct the experiment. Calculate the probability that among the two selected students, exactly one is a female student.  
After the experiment, the first student obtained experimental data of 68, 70, 71, 72, 74. The second student obtained experimental data of 69, 70, 70, 72, 74. Which student's experiment is more stable? And explain why.
user
0.5
rule
A high school's 11th-grade class 1 has 45 male students and 15 female students. The teacher uses stratified sampling to form a 4-person extracurricular interest group. Calculate the probability of a student being selected for this group and the number of male and female students in the extracurricular interest group.  
After a month of study and discussion, this interest group decides to select two students to conduct an experiment. The method is to first select one student from the group to conduct the experiment, and after that student has completed it, select another student from the remaining group members to conduct the experiment. Calculate the probability that among the two selected students, exactly one is a female student.  
After the experiment, the first student obtained experimental data of 68, 70, 71, 72, 74. The second student obtained experimental data of 69, 70, 70, 72, 74. Which student's experiment is more stable? And explain why.
train