Question

21) During a survey, Anu noted the following entries:
x+9,x+8, X+7,x+6,x+5,x+4,x+3,x+2,x+1,x
The median of these entries is 5.5. What is the value of x?
एक सर्वेक्षण के दौरान अनु ने निम्नलिखित प्रविष्टियाँ दर्ज की:
x +9,x + 8,x+7,x+6,x+5,x+4,x+3,x+2,x + 1,x​

Answer 1

Answer:

ANSWER

Given observations x,x+2,x+4,x+6,x+8

∵

5

x+(x+2)+(x+4)+(x+6)+(x+8)

=11

⇒

5

5x+20

=11

⇒x=7

So, the observations are 7,9,11,13,15

Req. mean =

3

11+13+15

=13

Answer 2

Answer:

mean=sum of observations /no of observations

24=x+x+2+x+4+x+6+x+8/5

120=5x+20

x= 20

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