Banker

Yes, of course, if you are weak in arithmetic, you can score amazingly well in other sections.
Without arithmetic, you can clear only preliminary exam, but job will be secured after the Mains exam. In pre you can do DI and your number series and BODMAS questions (It is the simplest of all) and try to score full in English and LR. But to be honest, arithmetic is the easiest topic in mathematics, 80 percent of arithmetic can be solved if you are good at calculations and plain logic.
So do well and nail the exam
But yes, to answer your question, the exam can be aced.
If you're from General category, then big no.
In prelims, only 50% portion of quants is arithmetic so you can score in other topics like number series, quadratic equations and simplification approximation. In Mains examination, 90 to 95% portion will be based on arithmetic there you cannot clear sectional cutoff if you ignore arithmetic. I suggest you that don't ignore whole arithmetic. Try to cover at least 40% of the syllabus of arithmetic
I hope this will help you.