No products in the cart.

What is the assume mean method, …

CBSE, JEE, NEET, CUET

CBSE, JEE, NEET, CUET

Question Bank, Mock Tests, Exam Papers

NCERT Solutions, Sample Papers, Notes, Videos

What is the assume mean method, with example

Posted by Priya Yadav 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 2 months ago

For calculating arithmetic mean from this data, We have to first take the midpoint of each class interval, represented by 'm' in the table. Then decide on anyone midpoint as assumed mean and find out the deviations.

Calculation of Arithmetic Mean

<th scope="col">Marks</th> <th scope="col">Number of Students (f)</th> <th scope="col">Mid-Value (m)</th> <th scope="col">dm (m-A) A=45</th> <th scope="col">fdm</th> <th scope="col"> </th>

10-20	2	15	-30	-60	-300
20-30	7	25	-20	-140
30-40	10	35	-10	-100
40-50	15	45	0	0
50-60	20	55	+10	+200	+700
60-70	16	65	+20	+320
70-80	6	75	+30	+180
	{tex}\Sigma f = 76{/tex}				{tex}\Sigma f d m = + 400{/tex}

After multiplying fd with m for all the values and finding the total of fdm, we apply the values to the formula of mean given below:

Now, {tex}\overline { X } = A + \frac { \Sigma f d m } { \Sigma f } \Rightarrow \overline { X } = 45 + \frac { 400 } { 76 }{/tex}
{tex}\Rightarrow \quad \overline { X } = 45 + 5.26 = 50.26{/tex}

ANSWER

http://mycbseguide.com/examin8/

Related Questions

sin60° cos 30°+ cos60° sin 30°

Posted by Vanshika Bhatnagar 1 year, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

(A + B )²

Posted by Abhishek Gupta 1 year, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

Posted by Kanika . 4 weeks, 2 days ago

CBSE > Class 10 > Mathematics

1 answers

Venu Gopal has twice

Posted by Lakshay Kumar 9 months, 3 weeks ago

CBSE > Class 10 > Mathematics

0 answers

X-y=5

Posted by Kishan Thakur 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Prove that root 8 is an irration number

Posted by Sahil Sahil 1 year, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Find the nature of quadratic equation x^2 +x -5 =0

Posted by Parinith Gowda Ms 1 week ago

CBSE > Class 10 > Mathematics

0 answers

Is it possible to design a rectangular mango Grove whose length is twice it's breadth, and the area is 800m²? If so, find it's length and breadth

Posted by Akshata Choukse 1 year, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

Posted by Hari Anand 2 months, 4 weeks ago

CBSE > Class 10 > Mathematics

0 answers

If 1/2 is a root of equation x^2+kx- 5/4 =0 , then what is the value of k

Posted by Parinith Gowda Ms 1 week ago

CBSE > Class 10 > Mathematics

1 answers

myCBSEguide App

myCBSEguide

Trusted by 1 Crore+ Students

Test Generator

Test Generator

Create papers online. It's FREE.

CUET Mock Tests

CUET Mock Tests

75,000+ questions to practice only on myCBSEguide app

Google Play

Download myCBSEguide App