MathSetuLogin
Home/Class 9/How Quantities Combine: Understanding Data

How Quantities Combine: Understanding Data Class 9

CBSE

Combining data from groups of different sizes: weighted averages, mixtures, percentages and stacked bar charts.

Video coming soon
Topic-wise short notes with solved examples.Open PDFDownload
Every formula and result of the chapter on one sheet.Open PDFDownload
Daily practice problems with an answer key.Open PDFDownload

What this chapter covers

  • Average of averages
  • Mixtures
  • The weighted mean
  • Custom weights
  • Adding or removing a value
  • Stacked bar charts
  • 100% stacked bar charts

The short notes explain each of these topics with solved examples, the formula bank lists every result on one sheet, and the DPP sheet gives practice questions with an answer key.

Join Telegram for daily problems

← Propositions and their ConversesThe World of Algorithms →