Q16 of 174 Page 608

Fill in the blanks in the following table:




























Marks



Frequency



Cumulative frequency



0-5



3



3



5-10



5



.......



10-15



8



.......



15-20



4



.......


Cumulative frequency is the total of frequency.





























Marks



Frequency



Cumulative frequency



0-5



3



3



5-10



5



8



10-15



8



16



15-20



4



20



More from this chapter

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14

Find the medium of the following frequency distribution:





















Variables



3



6



10



12



7



15



Frequency



3



4



2



8



13



10


 15

The mean of six numbers is 23. If one of the numbers is excluded, the mean of the remaining numbers is 20. Find the excluded number.

 17

In the city, the weekly observations made on the cost of living index are given below.































Cost of living index



Number of weeks



140-160



5



150-160



10



160-170



20



170-180



9



180-190



6



190-200



2



Represent the above information in the form of a histogram.

 18

The mean of the marks scored by 50 students was found to be 39, Later on, it was discovered that a score was 43 was misread as 23, Find the correct mean.