X Maths Mean median mode and Ogive(Statics)

Q.1. find the mean of the following frequency distribution: -
Ans. 25.2 (2)
Class
0-10
10-20
20-30
30-40
40-50
Frequency
8
12
10
11
9
aQ.2. find the mode of the following data. Ans.52 (2)
Class
0-20
20-40
40-60
60-80
Frequency
15
6
18
10
Q.3. the mean of the following frequency distribution is 50. Find the value of P.
Ans.P=52 (3)
Class
0-20
20-40
40-60
60-80
80-100
Frequency
17
28
32
P
19
Q.4. compute the median. Ans. 46.5 (3)
Weight in (kg)
Less than 38
Less than 40
Less than 42
Less than 44
Less than 46
Less than 48
Less than 50
Less than 52
Number of student
0
3
5
9
14
28
32
35
Q.5. find the missing frequency ( N = 100, median = 32 )
Ans. X=9, y= 16 (3)
Marks ob.
0-10
10-20
20-30
30-40
40-50
50-60
Total
No. of student
10
?
25
30
?
10
100
Q.6. the following table ages of 100 persons of a locality;
Ans.34.5 years (4)
Age ( year)
Number of persons
0-10
5
10-20
15
20-30
20
30-40
23
40-50
17
50-60
11
60-70
9
Draw the less than ogive and find the median.
Q.7. find the median class and the modal class for the following distribution.
Ans. 145-150 (2)
Class interval
135-140
140-145
145-150
150-155
155-160
160-165
Frequency
4
7
18
11
6
5
Q.8. write the following distribution as more than type cumulative frequency distribution.  (2)
Class interval
50-55
55-60
60-65
65-70
70-75
75-80
Frequency
2
6
8
14
15
5
Q.9.the mean of the following frequency distribution is 25.2 . find the missing frequency x.      ans.12   (3)
Class interval
0-10
10-20
20-30
30-40
40-50
Frequency
8
X
10
11
9
Q.10. find the mode.                      Ans.       39           (3)
Class interval
5-15
15-25
25-35
35-45
45-55
55-65
65-75
2
3
5
7
4
2
2
Q.11. Draw less than ogive for the following distribution and hence obtain the median.
 Ans. 58.75         (4)
Marks obtain
10-20
20-30
30-40
40-50
50-60
60-70
70-80
No. of student
3
4
3
3
4
7
9
Q.12. find the mode:      Ans. 36.25                           (2)
Marks obtain
0-10
10-20
20-30
30-40
40-50  
No. of student
6
10
12
32
20

Comments

  1. UnknownSeptember 17, 2012 at 5:03 AM

    I solved these questions and got some right results almost ten were right out of twelve.
    Math Order of Operations

    ReplyDelete

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