Q71.If the mean deviation of number 1, 1 + d, 1 + 2d, … . , 1 + 100d from their mean is 255 , then the d is equal to (1) 10.0 (2) 20.0 (3) 10.1 (4) 20.2
What This Question Tests
This question tests the ability to calculate the mean of an arithmetic progression and then compute the mean deviation from the mean, requiring summation of absolute differences.
Concepts Tested
Formulas Used
Mean of AP: (a + l)/2
Mean deviation = Σ|xi - x̄| / N
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📋 Question Details
- Chapter
- Statistics
- Topic
- Mean deviation of an Arithmetic Progression
- Year
- 2009
- Shift
- Unknown
- Q Number
- Q71
- Type
- MCQ
- NCERT Ref
- Class 11 Mathematics Ch 15: Statistics
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