Teachoo - the best website to learn maths & finance (using AI) - it's logo
  • Everything
    Class 6
    • Class 6 Maths (Ganita Prakash)
    • Class 6 Science (Curiosity)
    • Class 6 Social Science
    • Class 6 English
    Class 7
    • Class 7 Maths (Ganita Prakash - Part 1 and Part 2)
    • Class 7 Science (Curiosity)
    • Class 7 Social Science
    • Class 7 English
    Class 8
    • Class 8 Maths (Ganita Prakash - Part 1 & Part 2)
    • Class 8 Science (Curiosity)
    • Class 8 Social Science
    • Class 8 English
    Class 9
    • Class 9 Maths (Ganita Manjari - Part 1)
    • Class 9 Science (Exploration)
    • Class 9 Social Science
    • Class 9 English
    Class 10
    • Class 10 Maths
    • Class 10 Science
    • Class 10 Social Science
    • Class 10 English
    Class 11
    • Class 11 Maths
    • Class 11 Physics
    • Class 11 Chemistry
    • Class 11 Biology
    • Class 11 Accountancy
    • Class 11 English
    • Class 11 Computer Science (Python)
    Class 12
    • Class 12 Maths
    • Class 12 English
    • Class 12 Economics
    • Class 12 Accountancy
    • Class 12 Physics
    • Class 12 Chemistry
    • Class 12 Biology
    • Class 12 Computer Science (Python)
    • Class 12 Physical Education
    Courses
    • GST and Accounting Course
    • Excel Course
    • Tally Course
    • Finance and CMA Data Course
    • Payroll Course
    Interesting
    • Learn English
    • Learn Excel
    • Learn Tally
    • Learn GST (Goods and Services Tax)
    • Learn Accounting and Finance
    Popular
    • GST Demo
    • GST Tax Invoice Format
    • Accounts Tax Practical
    • Tally Ledger List
  • Classes
    • Class 6
    • Class 7
    • Class 8
    • Class 9
    • Class 10
    • Class 11
    • Class 12
  • Maths
    • Class 6 Maths (Ganita Prakash)
    • Class 7 Maths (Ganita Prakash - Part 1 & Part 2)
    • Class 8 Maths (Ganita Prakash - Part 1 & Part 2)
    • Class 9 Maths (Ganita Manjari - Part 1)
    • Class 10 Maths
    • Class 11 Maths
    • Class 12 Maths
    • Sample Paper Class 10 Maths
    • Sample Paper Class 12 Maths
  • Science
    • Class 6 Science (Curiosity)
    • Class 7 Science (Curiosity)
    • Class 8 Science (Curiosity)
    • Class 9 Science (Exploration)
    • Class 10 Science
  • Finance
    • Learn Excel free
    • Learn Tally free
    • Learn GST (Goods and Services Tax)
    • Learn Accounting and Finance
    • GST and Income Tax Return Filing Course
    • Tally Ledger List
Login
  • Class 12
  • Class 11
  • Class 10
  • Class 9
  • Class 8
  • Class 7
  • Class 6
  • Practice
  • GST
  • Accounts Tax
  • Englishtan
  • Excel

  • Class 6 Maths (Ganita Prakash)
  • Class 6 Maths (old NCERT)
  • Class 6 Science (Curiosity)
  • Class 6 Science (old NCERT)
  • Class 6 Social Science
  • Class 6 English

  • Class 7 Maths (Ganita Prakash)
  • Class 7 Maths (Ganita Prakash - Part 2)
  • Class 7 Maths (old NCERT)
  • Class 7 Science (Curiosity)
  • Class 7 Science (old NCERT)
  • Class 7 Social Science
  • Class 7 English

  • Class 8 Maths (Ganita Prakash)
  • Class 8 Maths (Ganita Prakash - Part 2)
  • Class 8 Maths (old NCERT)
  • Class 8 Science (Curiosity)
  • Class 8 Science (old NCERT)
  • Class 8 Social Science
  • Class 8 English

  • Class 9 Maths (Ganita Manjari - Part 1)
  • Class 9 Maths (old NCERT)
  • Class 9 Science (Exploration)
  • Class 9 Science (old NCERT)
  • Class 9 Social Science
  • Class 9 English

  • Class 10 Maths
  • Class 10 Science
  • Class 10 Social Science
  • Class 10 English

  • Class 11 Maths
  • Class 11 Physics
  • Class 11 Chemistry
  • Class 11 Biology
  • Class 11 Accountancy
  • Class 11 Computer Science (Python)
  • Class 11 English

  • Class 12 Maths
  • Class 12 English
  • Class 12 Economics
  • Class 12 Accountancy
  • Class 12 Physics
  • Class 12 Chemistry
  • Class 12 Biology
  • Class 12 Computer Science (Python)
  • Class 12 Physical Education

  • GST and Accounting Course
  • Excel Course
  • Tally Course
  • Finance and CMA Data Course
  • Payroll Course

  • Learn English
  • Learn Excel
  • Learn Tally
  • Learn GST (Goods and Services Tax)
  • Learn Accounting and Finance

  • GST Demo
  • GST Tax Invoice Format
  • Accounts Tax Practical
  • Tally Ledger List
Login

  • Answer of this question

    I am not able to seen answer video. Please help me us to understand th
    Gaurav Marwah's image
    Gaurav Marwah

    Sir, please upload video for Countif formula for counting duplicates , to understand the same in better way.

     

    Thanks & Regards

    Written on Aug. 1, 2017, 3:50 p.m.

    Comment
Go ad-free with Teachoo Black
AD
Adblock detected

Skip every ad. Keep every answer.

Teachoo Black gives you a clean, uninterrupted study experience on every page.

Go ad-free →
A second ad-free Teachoo reminder
One last thing

This is what ad-free feels like.

No banners. No interruptions. Just the lesson.

Go ad-free →

Please login to view more pages. It's free :)

Teachoo gives you a better experience when you're logged in. Please login :)
Login

Built by teachers. Loved by students.

Download Our Apps

  • Android App
  • iOS App

Classes

  • Class 6 - NCERTSolutions, Worksheets, MCQ
  • Class 7 - NCERT Solutions, Worksheets, MCQ
  • Class 8 - NCERT Solutions, Worksheets, MCQ
  • Class 9 - NCERT Solutions, Worksheets, MCQ
  • Class 10 - NCERT Solutions, Worksheets, MCQ
  • Class 11 - NCERT Solutions, Worksheets, MCQ
  • Class 12 - NCERT Solutions, Worksheets, MCQ

Useful Resources

  • Visualisers — interactive learning tools
  • GST, Income Tax and Tally Course
  • Teachoo Ad free version
  • Worksheets and Quizzes
  • Skillistan
  • GST Simulation Portal

Sample Paper Solutions

  • Class 10 Maths
  • Class 10 Science
  • Class 10 English
  • Class 10 Social Science
  • Class 12 Maths
  • Class 12 English

Maths - Useful links

  • Class 6 Maths NCERT Solutions (Ganita Prakash)
  • Class 7 Maths NCERT Solutions (Ganita Prakash - Part 1 and 2)
  • Class 8 Maths NCERT Solutions (Ganita Prakash - Part 1 and 2)
  • Class 9 Maths NCERT Solutions (Ganita Manjari - Part 1)
  • Class 10 Maths NCERT Solutions
  • Class 11 Maths NCERT Solutions
  • Class 12 Maths NCERT Solutions

Science - Useful Links

  • Class 6 Science NCERT Solutions (Curiosity)
  • Class 7 Science NCERT Solutions (Curiosity)
  • Class 8 Science NCERT Solutions (Curiosity)
  • Class 9 Science NCERT Solutions (Exploration)
  • Class 10 Science NCERT Solutions

Interesting

  • Learn English
  • Learn Excel
  • Learn Tally
  • Learn GST (Goods and Services Tax)

Other Useful Links

  • Englishtan
  • Class 10 Maths - Basic vs Standard
  • CBSE Sample Papers
Follow Teachoo on Facebook Follow Teachoo on Instagram Follow Teachoo on Twitter Follow Teachoo on Youtube Follow Teachoo on Linkedin
About us Contact us Terms of Service Privacy Policy Refund Policy Advertise with Teachoo

Made with lots of love and caffeine since 2014

© 2026, Teachoo. All rights reserved.