Advertisements
Advertisements
प्रश्न
The height of 8 students X in centimetres are given below:
148, 162, 160, 154, 170, 162, x, 152
If the mean height is 158, find x.
Advertisements
उत्तर
Mean = `(sumx)/"N"`
= `(148 + 162 + 160 + 154 + 170 + 162 + x + 152)/(8)`
= `(1108 + x)/(8)`
∴ 158 = `(1108 + x)/(8)`
⇒ 1264 = 1108 + x
⇒ x = 156
∴ Mean height = 156cm.
APPEARS IN
संबंधित प्रश्न
The mean of 15 observations is 32. Find the resulting mean, if each observation is: Multiplied by 2
The mean of 15 observations is 32. Find the resulting mean, if the observation is: Divided by 0.5
The mean of 18, 24, 15, 2x + 1 and 12 is 21. Find the value of x.
Find the mean of the following data: 30, 32, 24, 34, 26, 28, 30, 35, 33, 25
(i) Show that the sum of the deviations of all the given observations from the mean is zero.
(ii) Find the median of the given data.
In History project, marks out of 20 were awarded to 8 students. The marks were as shown below:
14, 16, 18, 14, 16, 14, 12, 16
Find the mean marks.
The mean of 16 natural numbers is 48. Find the resulting mean, if each of the number is increased by 5
The mean of 16 natural numbers is 48. Find the resulting mean, if each of the number is multiplied by 4
The mean of 16 natural numbers is 48. Find the resulting mean, if each of the number is increased by 50%
The mean of 16 natural numbers is 48. Find the resulting mean, if each of the number is decreased by 10%
The mean of 200 observations is 20. It is found that the value of 180 is wrongly copied as 280. Find the actual mean.
