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google.com, pub-2985501598867446, DIRECT, f08c47fec0942fa0
Que 3---Marks obtained by 40 students
-Marks Number of Students -
5. 6
6. . AIf mean is 7.2 find value of A and B
Que 4----Find. Mean for given data
Class - Interval. Frequency
80--100. . 20. Que 5-- Find mean for following for data
Marks. Number of Students
11--20. 2
21-- 30. 6
31-- 40. 10
41-- 50. 12
51 -- 60. 9
61 - 70 7
71 --80. 4
Que 6 ---
Find mean for following data
Life time (days). Number of bulbs
Less than 50 70
Less than 100. 21
Less than 150. 52
Less than 200. 79
Less than 250 91
Less than 300. 100
Que 7 --If mean is 24 find value of "A "
Marks. Number of students
0. --10. 7
10---20. A
20-- 30. 8
30 --- 40 10
40 --- 50. 5
Que 10 ---
For following frequency distribution find upper limit of median class
Class Frequency
0--5 8
5--10. 10
10--- 15. 19
15--20. 25
20-- 25 8
Que 11
Draw a less than ogive graph for following frequency distribution
Class. Frequency
0---10 7
10 ---20. 14
20--30. 13
30-- 40 12
40--50 20
50 -- 60 11
60 --- 70 15
70 -. 80 8
Thu Nov 17, 2022