Advertisements
Advertisements
प्रश्न
The marks obtained by 10 students are listed below:
2, 5, 3, 8, 0, 9, x, 6, 1, 8
If the mean marks is 5, find x.
Advertisements
उत्तर
Mean = `(sumx)/"N"`
= `(2 + 5 + 3 + 8 + 0 + 9 + x + 6 + 1 + 8)/(10)`
= `(42 + x)/(10)`
∴ 5 = `(42 + x)/(10)`
⇒ 50 = 42 + x
⇒ x = 50 - 42 = 8.
APPEARS IN
संबंधित प्रश्न
Find the mean of x + 3, x + 5, x + 7, x + 9 and x + 11.
The mean of 15 observations is 32. Find the resulting mean, if the observation is: Increased by 3
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
Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if each of the observations, given above, be: decreased by 40%
The mean of 16 natural numbers is 48. Find the resulting mean, if each of the number is decreased by 8
The mean of 16 natural numbers is 48. Find the resulting mean, if each of the number is decreased by 10%
The mean of 4 observations is 20. If one observation is excluded, the mean of the remaining observations becomes 15. Find the excluded observation.
The mean monthly income of 8 men is Rs. 8079.75. A man whose monthly income is Rs. 8280 has also been taken into consideration. Calculate the mean monthly income of all the men.
The mean of 200 observations is 20. It is found that the value of 180 is wrongly copied as 280. Find the actual mean.
