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ICSE Class 10 Answered

How to solve the question and plot the graph?
question image
Asked by rashikulkarni28 | 25 Jun, 2022, 06:44: PM
answered-by-expert Expert Answer
Let's prepare the frequency table first as shown below:
 
Marks        Class marks(xi)           No. of students           Cumulative frequency
                                                Frequency (f)
0-10                  5                               5                                     5
10-20               15                              10                                   15
20-30               25                              14                                   29
30-40               35                              21                                   50
40-50               45                              25                                   75
50-60               55                              34                                   109
60-70               65                              36                                   145
70-80               75                              27                                   172
80-90               85                              16                                   188
90-100             95                              12                                   200
 
Upper limits will be plotted on x-axis and y-axis will have cumulative frequency
The points will be (10, 5), (20, 15), (30, 29), (40, 50), (50, 75), (60, 109), (70, 145), (80, 172), (90, 188), (100, 200)
Plot these points on the graph and join them with a smooth curve as shown:
Answered by Renu Varma | 26 Jun, 2022, 10:53: PM

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