<s>[INST] A young writer loves writing short stories and has already written ten of them. She wants to publish them in a book. However, she only feels confident in publishing only six of them. The remaining four she believes need some improvement. If she randomly selects 4 stories out of the 6 stories she feels confident in, what is the probability that the first story in the book is one of the 4 stories she knows needs improvement?[/INST]