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What career can I get with a level maths, psychology and sociology ?
But I would recommend doing the Insitute of Chartered Accountant of England & Wales (ICAEW) exams:
CERTIFICATE in FINANCE, BUSINESS & ACCOUNTING:
The CFAB is the first 6 papers of the ICAEW, and you do not need any qualifications for it. Anybody can register with the ICAEW.com website and sit the exams at a centre.
The Big 4 accounting firms, PwC, Deloitte, KPMG and EY ask for BBC for their training programmes. So you should be aiming for BBC at A-Level.
Also, there are 6 multiple choice exams in subjects: Accounting, Management Information, Principles of Taxation, Assurance, Business, Technology and Finance and Law.
You could then do the remaining 9 papers with an Accounting firm or any other business.
The average salary for an ACA (ICAEW) Chartered Accountant is £150,000 in London.
What career can I get with a level maths , psychology and sociology ?
NHS job roles - https://www.healthcareers.nhs.uk/explore-roles
And remember that many degree subjects have no specific subject requirements - including Law, International Relations etc.