Knowledge Check: How to set passing score to 90% for 7 questions?

Hi Team,

As per project requirement, need to set passing score to 90% (6 of 7) for 7 questions-Knowledge Check.

When I set it to 90%, even if I give correct answers for 6 questions, its not letting me pass. 

Can you please give me the solution, how to set passing score, so user can pass by giving 6 correct answers?

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