IBPS PO syllabus and pattern is as given below:

Examination Pattern:

Total marks: 100
1 hour time limit
100 questions from Quantitative Aptitude, English & Reasoning ability

Quantitative Aptitude: This section shall comprise of 35 questions that could be picked from the following chapters:
Numbers – Basics of Number Systems; HCF & LCM; Simplication; Number Series
Arithmetic – Averages & Allegations; Ratio & Proportion; Percentage, Profit & Loss; Simple & Compound Interest; Age Problems; Speed, Time & Distance; Time & Work
Modern Math – Probability; Permutations & Combinations
Geometry – Mensuration (question around area, perimeter and volume)
Quadratic Equations – These are questions where you are given 2 quadratic equations and asked to compare the magnitudes of x & y
DI – Data Interpretation & Data sufficiency

Reasoning: The below chapters are the most probable from which 35 questions could be asked:
Analytical Reasoning – Linear arrangements, Circular Arrangement, Selection, Matching etc.
Logical Inequalities – Different inequality relations are provided
Syllogism – Deductive logic questions with statement and conclusions.
Blood Relations – Questions related to family tree and relations.
Coding-Decoding – Words or phrases that are coded are provided and one needs to identify the matching codes.
Miscellaneous – A small number of questions may be dedicated to Direction sense, Input-Output, Critical reasoning (Assumptions, Courses of action, Arguments)

English: This section shall contain 30 questions from the following areas:
Reading Comprehension
Grammar
Parajumbles
Cloze Test & Fill in the blanks
Vocabulary

The various books which can be referred to for the bank PO examination are:

Guides & Practice Stuff:
IBPS PO Exam Guide (for Prelims & Main Exam) – Rs.355
Quantitative aptitude:
Magical book on Maths by M.Tyra – Rs.270
English
Objective English by Hari mohan prasad – Rs.329
Reasoning
Analytical reasoning by M.k pandey – Rs.158

Quantitative Aptitude
Reasoning
English

The plan which can be followed for preparation for the bank examination is as follows:

Week 1
Simplification, Number Series
(3 - 4 hours)
Analytical Reasoning
(12 - 14 hours)

Week 2
Arithmetic Topics -
Averages & Alligations; Ratio & Proportion; Age Problems;Percentage, Profit & Loss; Simple & Compound Interest;
Speed, Time & Distance;Time & Work
(12-15 hours)
Blood Relations, Coding-Decoding
(4-5 hours)
Parajumbles
(2-3 hours)

Week 3
Logical Inequalities
(3-4 hours)
Grammar & Sentence Correction
(4-5 hours)

Week 4
Quadratic Equations (Comparison)
(3-4 hours)
Syllogism
(3-4 hours)
Reading Comprehension + Vocabulary Practice
(8-10 hours)

Week 5
Data Interpretation & Sufficiency
(10 –12 hours)
Direction Sense, Critical Reasoning, Input - Output
(2-3 hours)
Cloze Test, Fill in the Blanks
(3-4 hours)

Week 6
Mensuration, Probability & PnC
(5-6 hours)
4-5 Full Length Mock Tests + Analysis
(8-10 hours)
(1 hour for each test + 1 hour for analysis)

Week 7
8-10 Full Length Mock Tests + Analysis
(16-20 hours)

Week 8
8-10 Full Length Mock Tests + Analysis
(16-20 hours)