單項(xiàng)選擇題某有獎(jiǎng)儲(chǔ)蓄每開(kāi)戶(hù)定額為60元,按規(guī)定,1萬(wàn)個(gè)戶(hù)頭中,頭等獎(jiǎng)1個(gè)為500元,二等獎(jiǎng)10個(gè)每個(gè)為100元,三等獎(jiǎng)100個(gè)每個(gè)為10元,四等獎(jiǎng)1000個(gè)每個(gè)為2元。某人買(mǎi)了5個(gè)戶(hù)頭,他得獎(jiǎng)的期望值是:()

A.2.20
B.2.25
C.2.30
D.2.45