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
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: Decreased by 20%
Find the median of: 25, 16, 26, 16, 32, 31, 19, 28 and 35
The mean weight of 60 students in a class is 40 kg. The mean weight of boys is 50 kg while that of girls is 30 kg. Find the number of boys and girls in the class.
The weight of the seven members of a family, in kilograms are given below:
20, 52, 56, 72, 64, 13, 80.
Find mean weight.
If the mean of 7, 16, 9, 15, 16, a, 12, 8, b, 11 is 12, write a in terms of b.
A test out of 25 marks was given to 16 students and marks scored are recorded below:
25, 8, 14, 20, 16, 22, 10, 15, 8, 7, 24, 18, 19, 6, 11, 14
Find the mean marks
A test out of 25 marks was given to 16 students and marks scored are recorded below: 25, 8, 14, 20, 16, 22, 10, 15, 8, 7, 24, 18, 19, 6, 11, 14
In the report, marks were entered out of 50. What is the mean of the recorded marks in the report?
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 multiplied by 4
