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The mean of the following distribution is 18. Find the frequency f of the class 19 – 21.
Read the bar graph given in Figure and answer the following questions:
Construct a histogram for the following data: | Monthly School fee (in ₹) | 30 – 60 | 60 – 90 | 90 – 120 | 120 – 150 | 150 – 180 | 180 – 210 | 210 – 240 | |---|---|---|---|---|---|---|---| | No of Schools | 5 | 12 | 14 | 18 | 10 | 9 | 4 |
The class mark of the class 90-120 is
The following table gives the marks scored by 100 students in an entrance examination. | Mark | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 | |------|------|-------|-------|-------|-------|-------|-------|-------| | No. of Students (Frequency): | 4 | 10 | 16 | 22 | 20 | 18 | 8 | 2 | Represent this data in the form of a histogram.
In a frequency distribution, the mid value of a class is 10 and the width of the class is 6. The lower limit of the class is
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