Advertisements
Advertisements
प्रश्न
If the arithmetic mean of 7, 5, 13, x and 9 is 10, then the value x is
विकल्प
10
12
14
16
उत्तर
The given data is 7, 5, 13, x and 9. They are 5 in numbers.
The mean is
`(7+5+13+x+9)/5`
`=(34+x)/5`
But, it is given that the mean is 10. Hence, we have
`(34+x)/5 =10`
⇒ 34 +x = 50
⇒ x = 50 -34
⇒ x = 16
APPEARS IN
संबंधित प्रश्न
Find the mean of all factors of 10.
Find the mean of the following data:
| x : | 19 | 21 | 23 | 25 | 27 | 29 | 31 |
| f : | 13 | 15 | 16 | 18 | 16 | 15 | 13 |
If the median of scores \[\frac{x}{2}, \frac{x}{3}, \frac{x}{4}, \frac{x}{5}\] and \[\frac{x}{6}\] (where x > 0) is 6, then find the value of \[\frac{x}{6}\] .
Mark the correct alternative in each of the following:
Which one of the following is not a measure of central value?
The mean of n observations is X. If each observation is multiplied by k, the mean of new observations is
A, B, C are three sets of values of x:
(a) A: 2, 3, 7, 1, 3, 2, 3
(b) 7, 5, 9, 12, 5, 3, 8
(c) 4, 4, 11, 7, 2, 3, 4
Which one of the following statements is correct?
The mean of a, b, c, d and e is 28. If the mean of a, c, and e is 24, What is the mean of band d?
Yield of soyabean per acre in quintal in Mukund's field for 7 years was 10, 7, 5, 3, 9, 6, 9. Find the mean of yield per acre.
A total of 25 patients admitted to a hospital are tested for levels of blood sugar, (mg/dl) and the results obtained were as follows:
| 87 | 71 | 83 | 67 | 85 |
| 77 | 69 | 76 | 65 | 85 |
| 85 | 54 | 70 | 68 | 80 |
| 73 | 78 | 68 | 85 | 73 |
| 81 | 78 | 81 | 77 | 75 |
Find mean, median and mode (mg/dl) of the above data.
There are 10 observations arranged in ascending order as given below. 45, 47, 50, 52, x, x + 2, 60, 62, 63, 74. The median of these observations is 53. Find the value of x. Also find the mean and the mode of the data.
