I did not get your point !!!???
25000+ students appearing every year for CA professional examinations and you are just attached to figures and result percentages.
My friend, passing is not that important untill you succeed in practical life.
You pass any exam be it CAT, CA, or CS but ultimate goal is to earn good job and rewards.
That comes from hard work and killer spirit to move ahead in life.
Don't bother about passing %. You are spreading wrong message. Even CAT results are poor does that mean every one should just sit with Graduation and continue earning 5000-6000 bucks.
To take as a back up is also not good along with CA as the amount of energy and focus CA needs gets divided. Stay with CA and make most of your articleship and daily studies.
Atleast you will gain experience which is more than enough to earn a good life and if you succeed passing CA, there is no one luckier. :-)
No Institute or University can fail you, if you study well and impress the examiners by your knowledge.