The average weight of a group of 3 people A, B and C is 70 kg. When D joins this group, the average becomes 60 kg. One man E, whose weight is 5 kg more than that of D, replaces A and the average weight of B, C, D, and E now becomes 59 kg. A’s weight (in kg) is:

39

Weight of D = 4 x 60 - 3 x70 = 30 Kg

Weight of E = 35

Weight of A B, C, D & E = 3 x 70 + 30 + 35 = 275

Weight of B, C, D, E = 4 x 59 = 236

So weight of A = 39