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प्रश्न
The average of two numbers are 20. One number is 24, another number is ____________
विकल्प
16
26
20
40
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उत्तर
16
Explanation;
Hint:
`(x + y)/2` = 20
x + y = 40
24 + y = 40
y = 40 – 24
= 16
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संबंधित 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 (frequency) 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`
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