Hi Eve,

Only the negative examples use 'de chance' as in-

Je n'ai pas de chance

Elle n'a pas de chance

but 

J'ai de la chance

Elle a de la chance

Take a look at the following Kwiziq lesson for further information -

https://kwiziq.learnfrenchwithalexa.com/revision/grammar/the-partitive-article-in-negative-sentences

Hope this helps!

Hi Mark,

Thank you for your suggestion, the lesson has now been adapted to avoid any confusion.

Bonne Continuation!