DAY -76 | Class 10th maths | STATISTICS | Mean of data | UP and CBSE | target 2026-27

In this video (Day 76), we dive into Class 10th Maths – Chapter 13: Statistics and learn how to find the Mean of Grouped Data step by step. We cover all three essential methods recommended for CBSE & UP Board examinations: Direct Method ($\bar{x} = \frac{\Sigma f_i x_i}{\Sigma f_i}$) Assumed Mean Method ($\bar{x} = a + \frac{\Sigma f_i d_i}{\Sigma f_i}$) Step-Deviation Method ($\bar{x} = a + \left( \frac{\Sigma f_i u_i}{\Sigma f_i} \right) \times h$) Watch till the end to understand class intervals, upper & lower limits, finding class marks ($x_i$), and verifying answers across all three methods. 00:00 - Introduction & Overview of Mean Methods 01:10 - Problem Statement (Grouped Frequency Distribution) 02:18 - Calculating Class Marks (xᵢ) 04:28 - Method 1: Direct Method 06:25 - Method 2: Assumed Mean Method (Finding dᵢ) 12:03 - Method 3: Step-Deviation Method (Finding uᵢ) 15:31 - Comparison & Summary of All 3 Formulas 18:15 - Next Topics (Ex 13.1, Mode & Median) & Playlist Info 📌 Topics Covered in This Lecture: • Introduction to Grouped Data & Frequency Distribution • What is Class Mark ($x_i$) and how to calculate it • Solving examples using Direct, Assumed Mean & Step-Deviation methods • Comparison of formulas to secure full marks in board exams 🔔 Subscribe to Prabhat Academy for daily structured lectures, NCERT solutions, and board exam preparation tips: #Class10Maths #Statistics #MeanOfData #DirectMethod #AssumedMeanMethod #StepDeviation #CBSEClass10 #UPBoard #NCERTMaths #PrabhatAcademy