For what value of x the mean of the given observations (2x − 5), (x + 3), (7 − x), (5 − x) and (x + 9) with frequencies 2, 3, 4, 6 and 1 respectively is 4?
1
2
3
4

Question

For what value of x the mean of the given observations (2x − 5), (x + 3), (7 − x), (5 − x) and (x + 9) with frequencies 2, 3, 4, 6 and 1 respectively is 4? 1. 1 2. 2 3. 3 4. 4

KnowledgeBoat · Accepted Answer

Observations (x) |Frequency (f)|fx ----|----|---- 2x -5|2|4x- 10 x + 3|3|3x + 9 7 - x|4|28 - 4x 5 - x|6|30 - 6x x + 9|1|x + 9 Total| f = 16| fx = 66 - 2x By formula, Hence, option 1 is the correct option.

Class	Frequency
0 – 10	8
10 – 20	p
20 – 30	12
30 – 40	13
40 – 50	10

Mathematics

For what value of x the mean of the given observations (2x − 5), (x + 3), (7 − x), (5 − x) and (x + 9) with frequencies 2, 3, 4, 6 and 1 respectively is 4?
1
2
3
4

Measures of Central Tendency

Related Questions

If the mean of the following distribution is 27, then the value of p is :
Class Frequency
0 – 10 8
10 – 20 p
20 – 30 12
30 – 40 13
40 – 50 10
6
7
9
11

The mean of 5 numbers is 27. If one of the numbers be excluded, their mean is 25. The excluded number is :
25
26
28
35

Mathematics

For what value of x the mean of the given observations (2x − 5), (x + 3), (7 − x), (5 − x) and (x + 9) with frequencies 2, 3, 4, 6 and 1 respectively is 4?1234

Measures of Central Tendency

Related Questions

If the mean of the following distribution is 27, then the value of p is :ClassFrequency0 – 10810 – 20p20 – 301230 – 401340 – 501067911

The mean of 5 numbers is 27. If one of the numbers be excluded, their mean is 25. The excluded number is :25262835

For what value of x the mean of the given observations (2x − 5), (x + 3), (7 − x), (5 − x) and (x + 9) with frequencies 2, 3, 4, 6 and 1 respectively is 4?
1
2
3
4

If the mean of the following distribution is 27, then the value of p is :
Class Frequency
0 – 10 8
10 – 20 p
20 – 30 12
30 – 40 13
40 – 50 10
6
7
9
11

The mean of 5 numbers is 27. If one of the numbers be excluded, their mean is 25. The excluded number is :
25
26
28
35