Question

8. The following observations are arranged in the
ascending order. If the median is 143, find x.
The observations are 129, 133, 139, 140, X,
x + 2, 147, 149, 150, 152.
(3 marks)
$\times \frac{?}{?}$
​

Answer 1

Answer:

Explanation:

Given observation are 11,12,14,(x−2),(x+4),(x+9),32,38,47 and median =24.

∵n=9(odd)

∴ Median=  

2

n+1

​  

th term

=  

2

9+1

​  

th term

24=5th term

∴x+4=24

x=24−4

x=20

Therefore, 11,12,14,(20−2),(20+4),(20+9),32,38,47=11,12,14,18,24,29,32,38,47

Now Mean=  

n

∑x

​  

 

=  

9

11+12+14+18+24+29+32+38+47

​  

 

=  

9

225

​  

=25.

Answer 2

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$\huge\mathfrak{Answer\:♡}$

$\mathcal{25...}$

$\huge{\ddot{\smile}}$

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