Question

Find the mean of the following​

Answer 1

Answer:

1 - Less then 10 = 12 students obtained less then 10 marks

2 - Less then 20 = 19 students obtained less then 20 marks

3 - Less then 30 = 35 students obtained less then 30 marks

4 - Less then 40 = 47 students obtained less then 40 marks

5 - Less then 50 = 58 students obtained less then 50 marks

6 - Less than 60 = 65 students obtained less then 60 marks

7 - Less than 70 = 84 students obtained less then 70 marks

8 - Less than 80 = 100 students obtained less then 80 marks

Step-by-step explanation:

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