Class 9 Exam > Class 9 Questions > If, for the set of observations 4, 7, x, 8, 9...
Start Learning for Free
If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then x is equal to
- a)9
- b)12
- c)8
- d)10
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then ...
Mean of Observations
The mean of a set of observations is the sum of the observations divided by the total number of observations.
Formula for Mean: (Sum of Observations) / (Total number of Observations)
Given Observation Set
The observation set is: 4, 7, x, 8, 9, 10.
Mean of Observation Set
The mean of the observation set is given as 8.
Therefore, (4+7+x+8+9+10) / 6 = 8.
4+7+x+8+9+10 = 48.
x = 48-38 = 10.
Hence, the value of x is 10.
Answer
Therefore, the correct answer is option 'D' which is 10.
The mean of a set of observations is the sum of the observations divided by the total number of observations.
Formula for Mean: (Sum of Observations) / (Total number of Observations)
Given Observation Set
The observation set is: 4, 7, x, 8, 9, 10.
Mean of Observation Set
The mean of the observation set is given as 8.
Therefore, (4+7+x+8+9+10) / 6 = 8.
4+7+x+8+9+10 = 48.
x = 48-38 = 10.
Hence, the value of x is 10.
Answer
Therefore, the correct answer is option 'D' which is 10.
Free Test
FREE
| Start Free Test |
Community Answer
If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then ...
Given observations =4, 7, x, 8, 9, 10
mean = 8
(formula) sum of observations /no of observations
8=4+7+x+8+9+10/6
8=38+x/6
8×6=38+x
48=38 + x
48-38=x
10=x (or) x=10
x observation is 10
so, correct option is D
mean = 8
(formula) sum of observations /no of observations
8=4+7+x+8+9+10/6
8=38+x/6
8×6=38+x
48=38 + x
48-38=x
10=x (or) x=10
x observation is 10
so, correct option is D
Attention Class 9 Students!
To make sure you are not studying endlessly, EduRev has designed Class 9 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 9.
|
Explore Courses for Class 9 exam
|
|
Similar Class 9 Doubts
Top Courses for Class 9View all
If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then x is equal toa)9b)12c)8d)10Correct answer is option 'D'. Can you explain this answer?
Question Description
If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then x is equal toa)9b)12c)8d)10Correct answer is option 'D'. Can you explain this answer? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then x is equal toa)9b)12c)8d)10Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then x is equal toa)9b)12c)8d)10Correct answer is option 'D'. Can you explain this answer?.
If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then x is equal toa)9b)12c)8d)10Correct answer is option 'D'. Can you explain this answer? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then x is equal toa)9b)12c)8d)10Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then x is equal toa)9b)12c)8d)10Correct answer is option 'D'. Can you explain this answer?.
Solutions for If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then x is equal toa)9b)12c)8d)10Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9.
Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Here you can find the meaning of If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then x is equal toa)9b)12c)8d)10Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then x is equal toa)9b)12c)8d)10Correct answer is option 'D'. Can you explain this answer?, a detailed solution for If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then x is equal toa)9b)12c)8d)10Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then x is equal toa)9b)12c)8d)10Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice If, for the set of observations 4, 7, x, 8, 9, 10 the mean is 8, then x is equal toa)9b)12c)8d)10Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 9 tests.
|
|
Explore Courses for Class 9 exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup