Which one should I bet on? It's obvious, isn't it?
Which should I lay money on? It should be obvious, right?
「どっちに賭ければ良いかは一目瞭然ですよね？」＝ Which one should I bet on? It's obvious, isn't it? / Which should I lay money on? It should be obvious, right?
ボキャブラリー
which ＝ どっち
should ＝ ～すれば良い
bet on/lay money on ＝ 賭ける
一目瞭然 ＝ obvious, plain to see, as plain as dayなど
isn't it / right? ＝ だよね（付加疑問文）
イギリス 
