Backdoor bachelor's business degree?

[Kab]

Do I have to take the 16 credits (attempted) or do I have to pass the 16 credits (passed)?
I mean if I fail any exam I have to take the courses later to still be able to graduate with all the 16 credits at TESU. Maybe take more than 16 to try to ensure the 16 passed credits (if 16 attempted is not enough)?

How much work is a normal course at TESU in relationship to a E-pack?

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And thanks for the tips.