IBPS RRB PO Bar Charts

A bar chart displays data through bars where each bar's dimension (height in vertical charts, length in horizontal charts) shows the quantity or value. The bars can be grouped, stacked, or simple depending on data presentation

Bar charts have two axes - horizontal (x-axis) and vertical (y-axis). One axis shows categories while the other shows values. Bars should have equal width and proper spacing. Scale must be uniform and clearly marked

• Percentage = (Part/Whole) × 100 • Percentage Increase = [(New Value - Old Value)/Old Value] × 100 • Percentage Decrease = [(Old Value - New Value)/Old Value] × 100 • Average = Sum of all values / Number of values • Ratio = Value A : Value B

finding totals, averages, percentages, ratios, maximum/minimum values, and year-on-year comparisons. Multi-bar charts showing data for different categories across years are very common. Shortcut Trick #1 - Quick Percentage: For percentage questions, use the formula (Target Value/Base Value) × 100. Always identify which value is the base correctly. Shortcut Trick #2 - Ratio Simplification: When finding ratios, divide both numbers by their HCF. For example, 240:180 becomes 4:3 by dividing by 60. Shortcut Trick #3 - Average Formula: Instead of adding all values and dividing, use: Average = (Sum of products of each value and frequency) / Total frequency

In complex calculations, use approximation when answer choices are far apart. Round numbers to nearest 10 or 100 for quick mental math.