ーTwo out of five were broken, and the last three were broken as well.
「５個中２つは壊れていて、残りの３つも壊れていた。」
the last three で「最後の３つ」＝「残りの３つ」と言えます。
ーTwo out of five were broken, but the other three were ok.
「５個中２つは壊れていて、残りの３つは大丈夫だった。」
the other three で「他の３つ」＝「残りの３つ」とも言えます。
ご参考まで！
Out of the five, two were damaged, but the rest are fine.
Three out of five were damaged.
Two out of five were left undamaged.
ご質問ありがとうございます。
① "Out of the five, two were damaged,"＝「5個中、2個は壊れました。」
"but the rest are fine."＝「でも残りは大丈夫です。」
② "Three out of five were damaged."＝「5個中3個は壊れました。」
③ "Two out of five were left undamaged."＝「5個中2個は壊れないで残っていました。」
ご参考までに。
カナダ 
アメリカ合衆国 
