Question

E Miscellaneous Problems :
40. Among a group of students, 10% scored marks below 20, 20%
10
8
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scored marks between 20 and 40, 35% scored marks between 40 and
60, 20% scored marks between 60 and 80, and the remaining 30
students scored marks between 80 and 100.
(a) Using the information prepare a frequency distribution of marks
of students.
(b)
minimum 40 marks are required for passing, how many
students have passed the examination ?
(c) If maximum 60 marks are required for getting first class, how
many students secured first class ?
41 Prepare a frequency distribution for each of the following.​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer &Explanation:

Percentage of remaining students= 100-(10+20+35+20)

=100-85

=15%

Let the total number of student be x.

15% of x=30

x=30×100÷15=200

Marks scored No.of students

0-20 10%of 200=20

20-40 20%of 200=40

40-60 35%of 200=70

60-80 20%of 200=40

80-100 15%of 200=30

Total=200

Now you have to draw histogram diagram on graph....