Advertisements
Advertisements
प्रश्न
In a class test in mathematics, 10 students scored 75 marks, 12 students scored 60 marks, 8 students scored 40 marks and 3 students scored 30 marks. Find the mean of their score
Advertisements
उत्तर
Total marks of 10 students = 10 × 75 = 750
Total marks of 12 students = 12 × 60 = 720
Total marks of 8 students = 8 × 40 = 320
Total marks of 3 students = 3 × 30 = 90
Total marks of (10 + 12 + 8 + 3) 33 students
= 750 + 720 + 320 + 90
= 1880
Mean of marks = `1880/33`
= 56.97 or 57 approximately
Aliter:
Total number of students = 10 + 12 + 8 + 3
= 33
Mean of their marks
= `"Total marks"/"Number of students"`
= `(10 xx 75 + 12 xx 60 + 8 xx 40 + 3 xx 30)/33`
= `(750 + 720 + 320 + 90)/33`
= `1880/33`
= 56.97 or 57 approximately
APPEARS IN
संबंधित प्रश्न
A cricketer scores the following runs in eight innings:
58, 76, 40, 35, 46, 45, 0, 100
Find the mean score.
The data 6, 4, 3, 8, 9, 12, 13, 9 has mean 9.
The` "n"^(th)` term of the A. P. 3, 8, 13, 18, ............ is 148. Find n
Find the mean of first six multiples of 3.
The algebraic sum of the deviations of a set of n values from their mean is
The average of integers between −10 to 10 is __________
Ages of 15 students in 8th standard is 13, 12, 13, 14, 12, 13, 13, 14, 12, 13, 13, 14, 13, 12, 14. Find the mean age of the students
The marks of 14 students in a science test out of 50 are given below. 34, 23, 10, 45, 44, 47, 35, 37, 41, 30, 28, 32, 45, 39 Find the maximum mark obtained
Mean of the observations can be lesser than each of the observations.
The following are weights (in kg) of 12 people.
70, 62, 54, 57, 62, 84, 75, 59, 62, 65, 78, 60.
- Find the mean of the weights of the people.
- How many people weigh above the mean weight?
- Find the range of the given data.
