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The Following Frequency Distribution Table Shows Marks Obtained by 180 Students in Mathematics Examination - Algebra

Graph

The following frequency distribution table shows marks obtained by 180 students in Mathematics examination

Marks  No .of. students
0 - 10 25
10 - 20  x

 20 - 30

30
30 - 40 2x
40 - 50 65

Find the value of x.
Also draw a histogram representing the above information.

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Solution

25 + x + 30 +2x + 65 = 180
3x = 60 
x = 20 

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