The average of five numbers is 49. The average of the first and the second numbers is 48 and the average of the fourth and fifth numbers is 28. What is the third number?
(A) 92
(B) 91
(C) 95
(D) Cannot be determined
(E) None of these

• Answer is (E)
  
  let 5 numbers be - a,b,c,d,e
  
  As , average of 5 numbers are 49
  a+b+c+d+e = (49 *5 ) = 245 ---------- 1st equation
  
  and also
  
  a+b= (48*2) = 96
  d+e= (28*2) = 56
  
  putting the values into 1st equation
  
  96 + c + 56 = 245
  
  c = 93.
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