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प्रश्न
If the arithmetic mean of 8, 4, x, 6, 2, 7 is 5, then the value of x is ______.
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उत्तर
If the arithmetic mean of 8, 4, x, 6, 2, 7 is 5, then the value of x is 3.
Explanation:
We know that,
Mean = `"Sum of all observations"/"Total number of observations"`
⇒ `5 = (8 + 4 + x + 6 + 2 + 7)/6` ...[∵ Mean = 5, given]
⇒ 30 = 27 + x
⇒ 30 – 27 = x
⇒ 3 = x
∴ x = 3
Hence, the value of x is 3.
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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?
Find the common difference of the A.P 3, 5, 7, ..........
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Find the mean of the following data.
5.1, 4.8, 4.3, 4.5, 5.1, 4.7, 4.5, 5.2, 5.4, 5.8, 4.3, 5.6, 5.2, 5.5
The mean of first fifteen even numbers is ____________
The marks in a subject for 12 students are as follows:
31, 37, 35, 38, 42, 23, 17, 18, 35, 25, 35, 29
For the given data, find the mean
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