声声中国语:十有八九 very probable; in all likelihood; ten to one

十有八九。(Shí yǒu bā jiǔ.)very probable; in all likelihood; ten to one

Explanation

“十有八九” 指绝大多数，差不多，也表示可能性很大。一般作状语也可以用作定语。
“十有八九” (shí yǒu bā jiǔ) means almost or nearly. It is often used as adverbials, which refers to great probabilities. It also can be used as attribute.
Words:

逛街ɡuànɡ jiē:shopping;
钱包qiánbāo:wallet;
夏令营xià lìnɡyínɡ:summer camp.

Sentences

1、Jiă: Zuótiān guàngjiē de shíhou, wǒ de qiánbāo tūrán bú jiàn le.
甲：昨天逛街的时候，我的钱包突然不见了。
A: I suddenly lost my wallet when I was shopping yesterday.

Yǐ: Wǒ cāi shí yǒu bā jiǔ shì ràng xiǎotōu gěi tōu le.
乙：我猜十有八九是让小偷给偷了。
B: I guess it was probably stolen by the thief.

2、Jiă: Zhè cì xiàlìngyíng shí yǒu bā jiǔ de xuésheng shì láizì Běijīng de.
甲：这次夏令营十有八九的学生是来自北京的。
A: Most students are from Beijing in this summer camp.

Yǐ: Hěn hǎo a, zhèyàng nǐ jiù yǒu jīhuì duōgēn tāmen xuéxue Hànyǔ le.
乙：很好啊，这样你就有机会多跟他们学学汉语了。
B: Great! You can practice your Chinese more often with them.