Short Answer TypeThe arithmetic mean of the following frequency distribution is 25. Determine the value of P.
|
Classes |
Frequency |
|
0-10 |
5 |
|
10-20 |
18 |
|
20-30 |
15 |
|
30-40 |
P |
|
40-50 |
6 |
If the mean of the following distribution is 27. Find the value of P.
|
Classes |
Frequency |
|
0-10 |
8 |
|
10-20 |
P |
|
20-30 |
12 |
|
30-40 |
13 |
|
40-50 |
10 |
If the mean of the following distribution is 54. Find the value of P:
|
Classes |
Frequency |
|
0-20 |
7 |
|
20-40 |
P |
|
40-60 |
10 |
|
60-80 |
9 |
|
80-100 |
13 |
If the mean of the following distribution is 50. Find the value of f1.
|
Class |
Frequency |
|
0-20 |
17 |
|
20-40 |
28 |
|
40-60 |
32 |
|
60-80 |
f1 |
|
80-100 |
19 |
Find the mean of the following frequency distribution:
|
Class |
Frequency |
|
25-29 |
14 |
|
30-34 |
22 |
|
35-39 |
16 |
|
40-44 |
6 |
|
45-49 |
5 |
|
50-54 |
3 |
|
55-59 |
4 |
The mean of the following frequency distribution is 62.8. Find the missing frequency x.
|
Class |
10 - 20 |
20 - 40 |
40 - 60 |
60 - 80 |
80 - 100 |
100 - 120 |
|
Frequency |
5 |
8 |
x |
12 |
7 |
8 |
A survey regarding the heights (in cm) of 50 girls of class X of a school was conducted and the following data was obtained.
|
Heights in cm |
120 - 130 |
130 - 140 |
140 - 150 |
150 - 160 |
160 - 170 |
Total |
|
Number of girls |
2 |
8 |
12 |
20 |
8 |
50 |
Find the mean, median and mode of the above data.
100 surnames were randomly picked up from a local telephone directory and the distribution of the number of letters of the English alphabet in the surnames was obtained as follows:
|
Heights of letters |
1 - 4 |
4 - 7 |
7 - 10 |
10 - 13 |
13 - 16 |
16 - 19 |
|
Number of surnames |
6 |
30 |
40 |
16 |
4 |
4 |
Determine the median and mean number of letters in the surnames. Also find the modal size of surnames.
Find the mean, mode and median of the following data :
|
Classes |
Frequency |
|
0-10 |
5 |
|
10-20 |
10 |
|
20-30 |
18 |
|
30-40 |
30 |
|
40-50 |
20 |
|
50-60 |
12 |
|
60-70 |
5 |
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