The average weight of four boys A, B, C, and D is 75 kg. The fifth boy E is included and the average weight decreases by 4 kg. A is replaced by F. The weight of F is 6 kg more than E. Average weight decreases because of the replacement of A and now the average weight is 72 kg. Find the weight of A.  Choose the correct choice from the following answers
A) 57 kg  B) 54 kg  C) 56 kg  D) 60 kg  E) 58 kg
Sum of the weight of A, B, C and D = 75 × 4 = 300 kg   and average weight of A, B, C, D and E = 71 kg   sum of the weight of A, B, C, D and E   = 71 × 5 = 355 kg   weight of E = 355 – 300 = 55 kg   weight of F = 55 + 6= 
<gadget id="calculator">55 + 6</gadget>
<output>61</output>
61 kg   Now, average weight of F, B, C, D and E= 72 kg   Sum of the weight of F, B, C, D and E = 72 × 5 = 360 kg   B + C + D = 360 – 55 – 61 = 244 kg.   Weight of A = 300 – 244 = 56 kg.   ANSWER:56 kg
<result>C</result>
The average weight of four boys A, B, C, and D is 75 kg. The fifth boy E is included and the average weight decreases by 4 kg. A is replaced by F. The weight of F is 6 kg more than E. Average weight decreases because of the replacement of A and now the average weight is 72 kg. Find the weight of A.