CBSE - CLASS 10 -

QUESTION:
The frequency distribution of daily rainfall in a town during a certain period is shown below: Unfortunately, due to manual errors, the information on the 20-40 mm range got deleted from the data. If the mean daily rainfall for the period was 35 mm, find the number of days when the rainfall ranged between 20-40 mm. Show your work

The frequency distribution of daily rainfall in a town during a certain period is shown below.
Unfortunately, the data for the 20–40 mm rainfall range was deleted due to manual error.
If the mean daily rainfall for the period was 35 mm, find the number of days when the rainfall ranged between 20–40 mm.

💡 In this video, we’ll use the mean formula in Statistics to find the missing frequency in a grouped frequency distribution table.
This is a classic CBSE Class 10 Maths problem from the chapter Statistics, perfect for board exam preparation and concept strengthening.

🧮 What You’ll Learn

How to find missing frequency using the mean

Application of the mean formula for grouped data

Step-by-step approach to solving missing data problems

Real-life connection of Statistics and rainfall data

Important board exam-style question and strategy

📚 Concepts Covered

Mean of grouped frequency distribution

Class interval and frequency table

Finding unknown frequency (f)

Verification using formula

Concept application in real-world data

👩‍🏫 Perfect For

CBSE Class 10 students preparing for 2025 Board Exams

ICSE & State Board students learning Statistics

Teachers explaining mean-based problems

Learners wanting to master data interpretation in Maths

#StatisticsClass10 #CBSEMaths #MissingFrequency #MeanOfGroupedData
#Class10Maths #BoardExamPreparation #MathsWithConcepts #NCERTMaths #DataHandling #LearnStatistics #MathsTricks #Class10BoardExams #MathsSimplified #CBSE2025 #MathsRevision #CBSE2025_26