Question

in a class test in maths, 10 students scored 75 marks, 12 students scored 60 marks, 8students scored 40 marks and 3 student scored 30 marks. find the mean of their score​

Answer 1

Answer:

56.9696

Step-by-step explanation:

total no of students = 33

mean = (10 x 75 + 12 x 60 + 8 x 40 + 3 x 30)/33

         =(750+720+320+90)/33

         =1880/33

         =56.9696

hope this helpss..mrk me as brainliest plss..

Answer 2

Answer: 51.25

Step-by-step explanation: to find the mean of the number 1st you have to add all the score and then devide the sum with the number of scores of student is given to you

ATQ

Sum of the scores = 75+60+40+30

=205

Mean =205/4

=51.25