Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 莱蒂西亚、妮娜和罗莎莉的舞蹈队总共有25个人。如果有8个人退出，但有13个新人加入，现在舞蹈队有多少人？


### Response:
 有25 - 8 = <<25-8=17>>17个人在8个人退出后的舞蹈队。
因此，现在舞蹈队有17 + 13 = <<17+13=30>>30个人。