Banker

Earning the Certified Financial Planner CFP or Chartered Financial Analyst CFA designation can be beneficial for professionals working in government banks, as it demonstrates a high level of knowledge and expertise in finance, investments, and financial planning. While it's not a guarantee that earning these certifications will lead to a job, promotion, or increment in a government bank, it can increase your credibility and marketability as a financial professional. It can also demonstrate your commitment to professional development and continuing education, which can be valuable to employers. In general, government banks tend to value professional certifications and designations, as they indicate that an employee has a high level of expertise in a specific area. However, the specific value of these certifications will depend on the individual employer and the job responsibilities. Therefore, if you are interested in pursuing a career in finance or financial planning in a government bank, earning a CFP or CFA designation can help you stand out from other job candidates and potentially increase your chances of landing a job or promotion.

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.