プログレッシブ和英中辞典(第4版)の解説
こうさん【公算】
(a) probability; (a) likelihood; a (good) chance
明日は晴れる公算が大きい
There is a good chance that it will be fine tomorrow.
ライオンズ優勝の公算大だね
「The chances are that [In all probability] the Lions will win the pennant.
保守党が分裂する公算が高まってきた
The likelihood [probability] of a split in the conservative party has increased.／A split in the conservative party seems increasingly likely.