设一个总体含有3个可能元素，取值分别为1，2，3。从该总体中采取重复抽样方法抽取样本量为2的所有可能样本，样本均值为2的概率值是（　　）。

A、<img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/9375f99f-e927-4750-8e0d-f80dce34af89.jpg" width="11" height="39" />

B、<img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/09421f24-5f1f-43b3-ae14-027674ad8309.jpg" width="16" height="37" />

C、<img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/e0fdf0da-3175-4bec-a952-cc7747ffef1e.jpg" width="10" height="38" />

D、<img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/49e24dab-4dfc-4103-8dd4-5c9f6671ca1d.jpg" width="14" height="37" />

A、<img src='/s/tiw/p3/UpLoadImage/2013-05-07/9375f99f-e927-4750-8e0d-f80dce34af89.jpg' width='11' height='39'>

B、<img src='/s/tiw/p3/UpLoadImage/2013-05-07/09421f24-5f1f-43b3-ae14-027674ad8309.jpg' width='16' height='37'>

C、<img src='/s/tiw/p3/UpLoadImage/2013-05-07/e0fdf0da-3175-4bec-a952-cc7747ffef1e.jpg' width='10' height='38'>

D、<img src='/s/tiw/p3/UpLoadImage/2013-05-07/49e24dab-4dfc-4103-8dd4-5c9f6671ca1d.jpg' width='14' height='37'>