Question

15. Average weight of 4 men A,B and C and D is 67 kg, the 5th man E is included and the avg
weight decrease by 2 kg. the weight of F is 4 kg more than E. when A is replaced by F, then
average the group of 5 persons change from 65 to 64. What is the weight of A?
a) 60 kg b) 62 kg c) 64 kg d) 65 kg e) none​

Answer 1

Answer:

none

Step-by-step explanation:

Sum of the weight of A, B, C and D = 67 x 4 = 268 kg

and average weight of A, B , C , D and E = 67 - 2 = 65kg

∴ Sum of the weight of A, B, C, D and E = 65 x 5 = 325 kg

∴ Weight of E = 325 - 268 = 57 kg

∴ Weight of F = 57 + 4 = 61 kg

Now, average weight of F, B, C, D and E = 64 kg

∴ Sum of the weight of F, B, C, D and E = 64 x 5 = 320 Kg

∴ Sum of the weights of B, C and D = 320 - 57 - 61 = 202 kg

∴ Weight of A = 268 - 202 = 66 kg