In how many ways can 13 students be selected from a group of 15 students to serve on a chalkboard-cleaning team?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
In how many ways can 13 students be selected from a group of 15 students to serve on a chalkboard-cleaning team?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
105
In how many ways can 13 students be selected from a group of 15 students to serve on a chalkboard-cleaning team?
train