Question

If the mean of the following data is 20.2 .find the value of p X ----> 10,15,20,25,30 Y -----> 6,8,p,10,6

Answer 1

Solution:-
  
  X                              Y                              fx
 (x)                             (f) 
 
 10                              6                              60
 15                              8                             120
 20                              p                             20p
 25                             10                            250
 30                              6                             180
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                           ∑f = 30 + p              ∑fx = 610 + 20p 
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Mean = ∑fx/∑f
20.2 = (610 + 20p)/(30 + p)
606 + 20.2p = 610 + 20 p
20.2p - 20p = 620 - 606
0.2p = 4
p = 4/0.2
p = 20
So, the value of p is 20
Answer.

Answer 2

Hi there!

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What is Mean?

The average of a given set of numbers is called the Arithmetic mean, or simply the mean, of the given numbers.

Mean = $\frac{Sum \: of \: observations }{Number \: of \: observations }$

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For your solution to the given question refer to the attachment.

Thanks for the question!

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