Letter Writing (Informal) for SBI PO, IBPS PO Mains Exams – Set 38. 38. Write a letter to your friend advising him to prepare for competitive exams.A candidate should be grammatically strong and should strictly follow the formal or informal letter writing format. In SBI PO 50 marks are allocated for descriptive writing while in IBPS PO 25 Marks are allocated for this section. Write a Formal Letter to your Municipal Corporation in about 300 words complaining about the state of roads in your area and the lack of street lights there. The document lists 30 descriptive questions and 30 letter writing topics that have been asked in previous years' IBPS PO Mains exams. The descriptive paper of the IBPS PO mains exam is a 25 marks section and has two questions: one letter writing and one essay. The overall difficulty level of the IBPS PO Mains 2021 was Moderate and candidates were able to make 80 to 88 overall good attempts. Preparing for Bank, SSC or Govt Exams?