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

### Instruction:
 班级中有三分之二的学生有棕色的眼睛。其中一半的棕眼学生有黑色的头发。如果班级中有6个既有棕色眼睛又有黑色头发的学生，那么班级中总共有多少学生？


### Response:
 既有棕色眼睛又有任何颜色头发的学生人数是6 * 2 = <<6*2=12>>12。
班级中总共的学生人数是12 * 3/2 = <<12*3/2=18>>18。