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Q.

The number x is divided by rational number 7 5   to get 10 19  . The number x is: 


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a

15 19  

b

17 19  

c

10 19  

d

14 19   

answer is D.

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Detailed Solution

Given a rational number 7 5  .
According to the question,
x÷ 7 5 = 10 19  
x= 10 19 × 7 5  
Factorizing numerator and denominator,
x= 2×5 19 × 7 5  
x= 2 19 ×7  
x= 14 19  
The required number is 14 19  .
Hence, option 4 is correct.
 
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