They have totally different meanings. Look them up in an English-English dictionary and you'll see. Probability means likelihood. Opportunity refers to the circumstances allowing you to do something. The only thing that they have in common is the word 'chance'. 'Chance' has several meanings, and 'opportunity' is a synonym of one of its meanings, and 'opportunity' is a synonym of a different meaning. There is no overlap between 'opportunity' and 'probability'.

Opportunity : When you get a "Chance" to do something. For example:Nina got a chance to showcase her talent at the dance competition. Probability: When there is a "possibility" of something happening or some event taking place or not taking place. For example: The probability of rains in July is high in India. ( As it is rainy season in India during July ) Hope this helps!

opportunity is mean chance معناها فرصة probability احتمال