Q74.The median of 100 observations grouped in classes of equal width is 25 . If the median class interval is 20-30 and the number of observations less than 20 is 45 , then the frequency of median class is (1) 10 (2) 20 (3) 15 (4) 12 JEE Main 2012 (19 May Online) JEE Main Previous Year Paper
What This Question Tests
This question assesses the ability to apply the formula for calculating the median of grouped data, requiring the identification of various components from the given statistical information.
Concepts Tested
Formulas Used
Median = L + [(N/2 - cf) / f] * h
L = lower limit of median class
N = total number of observations
cf = cumulative frequency of class preceding median class
f = frequency of median class
h = class width
📚 NCERT Sections This Tests
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📋 Question Details
- Chapter
- Statistics
- Topic
- Median of grouped data
- Year
- 2012
- Shift
- 19 May Online
- Q Number
- Q74
- Type
- MCQ
- NCERT Ref
- Class 10 Mathematics Ch 14: Statistics, Class 11 Mathematics Ch 15: Statistics (advanced concepts)
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