Direct Method
Trending Questions
Q.
Find the mean of the distribution: Class , Frequency .
Q.
Question 9
Following table gives the distribution of students of sections A and B of a class according to the marks obtained by them.
Section ASection BMarksFrequencyMarksFrequency0−1550−15315−301215−301630−452830−452545−603045−602760−753560−754075−901375−9010
Represent the marks of the students of both the sections on the same graph by two frequency polygons. What do you observe?
Q. The height of 7 students are listed.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1450147/original_n2_q2.PNG)
The mean height of the students before and after increasing the height by 2 cm is
The mean height of the students before and after increasing the height by 2 cm is
- 162 cm, 164 cm
- 166 cm, 170 cm
- 161.67 cm, 171, 26 cm
Q.
If the numbers 3, 5, 7, 4 have frequencies x, x+4, x-3, x+8 with their arithmetic mean of 4, then x will be _____.
53
74
23
113
Q. Different types of toys are listed with their prices.The mean of the given data is 18. Find the value of x.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1454034/original_cn_q5_tab.PNG)
- 20
- 18
- 12
- 22
Q. The time spent by a person for various programs is given. If he wants to spend equal time in all programs, what fraction of the total time will he have to spend?
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1528573/original_time.PNG)
- 840
- 1140
- 48
- 1040
Q. If the mean of five observations x, x+2, x+4, x+6 and x+8 is 11, then the mean of first three observations is:
Q.
The base for given base method multiplication is:
Q. The test scores of Clara are 68, 86, 76, x, 90. Which of the following gives the value of x, if the mean is 80?
- 70
- 80
- 82
- 72
Q. The height of 7 students are listed.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1450147/original_n2_q2.PNG)
The mean height of the students before and after increasing the height by 2 cm is
The mean height of the students before and after increasing the height by 2 cm is
- 166 cm, 170 cm
- 161.67 cm, 171, 26 cm
- 162 cm, 164 cm
Q. The number of kids and adults who participated in the outdoor games is given.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1461199/original_cn_dot_plot.PNG)
Which of the following is true about the mean of the two data?
Which of the following is true about the mean of the two data?
- Mean of both data are same.
- Mean of data 1(kids) > Mean of data 2 (adults)
- Mean of data 1(kids) < Mean of data 2 (adults)
- Mean of data 1 is twice that of mean of data2.