Statistics — Class 11 Mathematics NCERT Solutions (Free)
Free step-by-step NCERT solutions for Class 11 Mathematics chapter "Statistics" — 8 important questions with detailed answers for CBSE board exam preparation.
TL;DR: Free step-by-step NCERT solutions for Class 11 Mathematics chapter "Statistics" — 8 important questions with detailed answers for CBSE board exam prep…
By Syllab.in · Updated
Key Questions Covered:
- Find the mean of the data: 10, 15, 20, 25, 30
- Find the median of the data: 7, 11, 9, 15, 13, 8, 20
- Find the mode of the data: 5, 8, 5, 9, 8, 5, 7, 8, 9, 5
- + 5 more questions in the full chapter
Solutions Summary:
| Question | Status |
|---|---|
| Find the mean of the data: 10, 15, 20, 25, 30 | ✓ Solved |
| Find the median of the data: 7, 11, 9, 15, 13, 8, 20 | ✓ Solved |
| Find the mode of the data: 5, 8, 5, 9, 8, 5, 7, 8, 9, 5 | ✓ Solved |
Showing 3 of 8 questions
Q1: Find the mean of the data: 10, 15, 20, 25, 30
Given data: 10, 15, 20, 25, 30
Step 1: Use the formula for mean:
Mean = (Sum of all observations)/(Number of observations)
Step 2: Calculate the sum:
Sum = 10 + 15 + 20 + 25 + 30 = 100
Step 3: Count the number of observations:
N = 5
Step 4: Calculate the mean:
Mean = 100/5 = 20
Final Answer: Th...
Q2: Find the median of the data: 7, 11, 9, 15, 13, 8, 20
Given data: 7, 11, 9, 15, 13, 8, 20
Step 1: Arrange the data in ascending order:
7, 8, 9, 11, 13, 15, 20
Step 2: Count the number of observations:
N = 7 (odd number)
Step 3: For odd n, median is the middle value:
Median is at position (n + 1)/2 = (7 + 1)/2 = 4
Step 4: The 4th value in the ordere...
Q3: Find the mode of the data: 5, 8, 5, 9, 8, 5, 7, 8, 9, 5
Given data: 5, 8, 5, 9, 8, 5, 7, 8, 9, 5
Step 1: Count the frequency of each value:
5 appears 4 times
8 appears 3 times
9 appears 2 times
7 appears 1 time
Step 2: Identify the value with maximum frequency:
The value 5 appears most frequently (4 times).
Step 3: The mode is the value with the highe...
Showing 3 of 8 questions. Visit the full page for complete solutions.