Xiao Ming wants to buy a book worth 49 yuan, and he has 10 banknotes of two yuan and five yuan each. Does he have 2 payment methods? (no change required)
小明要买一本49元的书，他手上有贰元和伍元的纸币各10张．请问他有2种付钱方法？(不用找钱)
<result>2</result>