Question

11. The value of appropriate measure of dispersion for the following distribution of dali wages Below 30 30-39 40-49 50-59 Wages (*): 60-79 No. of workers 5 7 18 32 28 Above 80 10 is given by (a) * 11.03 (b) 10.50 (c) 11.68 (d) 11.68.
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Answer 1

Answer:

ok

Step-by-step explanation:

4x  

2

−(5k+1)x+5x=0 be α and α+1

∴α+α+1=  

4

5k+1

​

⇒α=  

8

5k−3

​

 and α(α+1)=  

4

5k

​

 

⇒  

8×8

(5k−3)(5k−3+8)

​

=  

4

5k

​

 

⇒(5k−3)(5k+5)=80k

⇒(5k−3)(k+1)=16k

⇒5k  

2

−14k−3=0

⇒(k−3)(5k+1)=0

⇒k=3,  

5

−1

​

 

Hence, negative value of k is  

5

−1

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