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प्रश्न
The mean of 18, 28, x, 32, 14 and 36 is 23. Find the value of x. Sum of data
उत्तर
∵ Mean = `"Sum of data"/"Number of data"`
`=> 23 = (18 + 28 + x + 32 + 14 + 36)/6`
`=> 23 = (128 + x)/6`
`=> 23 xx 6 = 128 + x`
⇒ 138 = 128 + x
⇒ 138 - 128 = x
∴ x = 10
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संबंधित प्रश्न
If the mean of the following distribution is 24, find the value of 'a '.
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| Number of students |
7 | a | 8 | 10 | 5 |
The mean of the following distribution is 52 and the frequency of class interval 30-40 is ‘f’. Find ‘f’.
| Class Interval | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 |
| Frequency | 5 | 3 | f | 7 | 2 | 6 | 13 |
Find the mean (correct to one place of decimal) by using short-cut method.
|
x |
40 |
41 |
43 |
45 |
46 |
49 |
50 |
|
f |
14 |
28 |
38 |
50 |
40 |
20 |
10 |
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