Among the group of students 10% scored marks below 20, 20% scored marks<br />between 20 and 40, 35% scored marks between 40 and 60, 20% scored marks<br />between 60 and 80. The remaining 30 students scored marks between 80 and 100.<br />Prepare frequency distribution table and draw a histogram.
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Answered by
12
Answer:
Let total students be 100.
Hence, marks of 20 students is 0 as they were absent.
30 students scored 20 marks (as they failed by 20 marks)
10 students scored 40 marks (just passed)
40 students scored 65 marks (average of 65)
Therefore, average score of the class is: (0 + 600 + 400 + 2600)/100 = 3600/100
= 36
Step-by-step explanation:
Answered by
6
Answer:
the average mark of the class is 36
Step-by-step explanation:
Let total students be 100
hence.marks of 20 students is 0 as they were absent
30 student scored 20
40 students scored 65
10 students scored 40
average of class =o+600+400+2600/100
=3600/100
=36
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