JEE Main 2026 Mathematics question
The mean deviation about the mean for the data
| xᵢ | 5 | 7 | 9 | 10 | 12 | 15 | |---|---|---|---|---|---|---| | fᵢ | 8 | 6 | 2 | 2 | 2 | 6 |
is equal to:
Answer: (C)
Solution
Mean = 234/26 = 9. Σfᵢ|xᵢ−9| = 32+12+0+2+6+36 = 88. MD = 88/26 = 44/13.