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The mean of the following data is 21.6 f...

The mean of the following data is `21.6` find the value of `p`.

A

`5`

B

`6`

C

`7`

D

`8`

Text Solution

Verified by Experts

The correct Answer is:
A
For calculating the mean, we perpare that table given below :

Mean = `(sum(f_(1)xx x_(1)))/(sumf_(i)) = (558+18p)/(25+p)`
but, mean = 21.6 (given)
` (558 + 18p)/(25+p) =21.6 Rightarrow 558 + 18p = 540 +21.6p`
` Rightarrow 3.6p =18`
` Rightarrow p= (18/3.6) = (180/36) =5`
Hence, p=5
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RS AGGARWAL-MEAN , MEDIAN AND MODE OF UNGROUPED DATA -Multiple Choice Questions (Mcq)
  1. The mean of the following data is 21.6 find the value of p.

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  2. If the mean of five observations x ,\ x+2,\ x+4,\ x+6,\ x+8\ i s\ 11...

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  3. If the mean of the observation x, x+3, x+5, x+7 and x+10 is 9, then me...

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  4. if overlinex is the mean of x(1),x(2),x(3),….,x(n) " then "sum(n)^(i=1...

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  5. If each observation of the data is decreased by 8 then their mean

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  6. The mean weight of 6 boys in a group is 48 kg. the individual weight o...

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  7. The mean of the marks scored by 50 students was found to be 39 later o...

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  8. The mean of 100 items was found to be 64. Later on it was discovered t...

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  9. The mean of 100 observation is 50. If one of the observation which was...

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  10. Let barx be the mean of x(1), x(2), ………, x(n) and bary be the mean of ...

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  11. If barx is the mean of x(1), x(2), …………., x(n), then for a ne 0, the m...

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  12. If barx(1), barx(2), barx(3),………barx(n) are the means of n groups with...

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  13. The mean of the following data is 8. Then, the value of p is

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  14. The runs scored by 11 members of a cricket team are 15,34,56,27,43,...

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  15. The weight of 10 students (in kg) are 55,40,35,52,60,38,36,45,31,44....

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  16. The median of the numbers 4,4,5,6,7,7,12,3,12 is

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  17. The median of the numbers 84,78,54,56,68,22,34,45,39,54 is

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  18. Mode of the data 15,17,19,14,18,15,14,20,19,14,15,19,14 is

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  19. The median of the data arranged in ascending order 8,9,12,18,(x+2),(x+...

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