Question

a class of 10 students was given a test in mathematics marks out of 50 secured by the students Where are as follows 38 31 41 36,29,27,32,38,39,45 find the mean score​

Answer 1

$\boxed{Question}$ :-

A class of 10 students was given a test in mathematics marks out of 50 secured by the students Where are as follows 38 31 41 36,29,27,32,38,39,45 find the mean score​

$\mathfrak{Solution}$ :-

Given ,

The observation in data of 10 students is

38 ,31 ,41 36,29,27,32,38,39,45

As we know ,

Mean = Sum of no.of observations in the data/Total number of observations

Mean = 38+31+41+36+29+27+32+38+39+45

————————————————————

10

Mean =

356/10

Mean = 35.6

So,The mean marks scored is $\boxed{35.6}$

==================================

In Statistics, we have ,

Mean ,Mode ,Median

Mean is the sum of observation by number of observations

Mode is the frequently occuring value in the data. Mode may or may not exist too .

Ex :-

6,9,5,7,6,3,2,6,8

Mode :- 6

1,2,3,4,5,6,7,8,9

MODE :- Doesn’t exist

Median is the middle most value after arranging all the observations either in ascending or descending order.

It is the value of a+b/2 if observations are even.

Answer 2

Concept

Mean = (sum of all the items)/(total number of items)

Given

marks of 10 students in a test out of 50 are- 38, 31, 41, 36, 29, 27, 32, 38, 39 and 45

Find

we need to find the mean score of the class

Solution

We have

38, 31, 41, 36, 29, 27, 32, 38, 39 and 45

The sum of all these numbers will be-

38 + 31 + 41 + 36 + 29 + 27 + 32 + 38 + 39 + 45 = 356

Thus the total marks are 356

and the total number of students are 10

Thus, the mean will be

356/10

= 35.6

Thus, the mean score of the class is 35.6

#SPJ2