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Assume that $7$ number’s are $a,b,c,d,e,f,g$.Now according to the given information:

  • $a+b+c+d+e+f+g=254….(i)$
  • $a+b+c=25\times 3=75….(ii)$
  • $e+f+g=44\times3=132...(iii)$

substitute (ii),(iii) to (i),we get: $75+d+132=254\implies d=254-207=47$

Option (B) is correct.

 

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