Question

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......With step by step

Answer 1

first,
take the marks
75,60,40,30
now add them all.
75+60+40+30
answer:205
now, take the students
10,12,8,3
now add them all
$10 + 12 + 8 + 3$
answer:33
the final answer will be
there were 33 students with total marks 210

Answer 2

Answer:

56.96

Step-by-step explanation:

10 students scored 75 marks

Total marks scored by 10 students = $75 \times 10 = 750$

12 students scored 60 marks

Total marks scored by 12 students = $60 \times 12 = 720$

8 students scored 40 marks

Total marks scored by 8 students = $40 \times 8 = 320$

3 students scored 30 marks

Total marks scored by 3 students = $30 \times 3 = 90$

So, total Marks = 750+720+320+90

                        =1880

Total no. of students = 10+12+8+3 = 33

So, $Mean = \frac{\text{Total scores}}{\text{No. of students}}$

$Mean = \frac{1880}{33}$

$Mean = 56.96$

Hence the mean of their score is 56.96