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प्रश्न
The following table shows the number of saplings planted by 30 students. Fill in the boxes and find the average number of saplings planted by each student.
| No. of saplings (Scores) xi |
No. of students (frequncy) fi |
fi x xi |
| 1 | 4 | 4 |
| 2 | 6 | `square` |
| 3 | 12 | `square` |
| 4 | 8 | `square` |
| N = `square` | ∑fixi = `square` |
Mean `bar "x"` = `square/"N"`
= `square/square`
= `square`
∴ The average number of trees planted `square`
उत्तर
| No. of saplings (Scores) xi |
No. of students (frequncy) fi |
fi×xi |
| 1 | 4 | 4 |
| 2 | 6 | = 2 x 6 = 12 |
| 3 | 12 | = 3 x 12 = 36 |
| 4 | 8 | = 4 x 8 = 32 |
| N = 30 | ∑fixi = 84 |
Mean `bar "x"` = `bb((sum f_ix_x))/"N"`
= `bb(84/30)`
= 2.8
∴ The average number of trees planted is 2.8.
संबंधित प्रश्न
Following table shows the points of each player scored in four games:
| Player | Game 1 | Game 2 | Game 3 | Game 4 |
| A | 14 | 16 | 10 | 10 |
| B | 0 | 8 | 6 | 4 |
| C | 8 | 11 | Did not play | 13 |
Now answer the following questions:
- Find the mean to determine A’s average number of points scored per game.
- To find the mean number of points per game for C, would you divide the total points by 3 or by 4? Why?
- B played in all the four games. How would you find the mean?
- Who is the best performer?
The data 6, 4, 3, 8, 9, 12, 13, 9 has mean 9.
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| No. of students | 6 | 8 | p | 10 | 6 |
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