The average weight of 5 person's increases by 4 kg when a new person comes in place of one of them weighing 50kg. What is the weight of the new person? Choose the correct choice from the following answers
A) 70	B) 86.5	C) 80	D) 88.5	E) 75

Rationale: "total increase in weight = 5 × 4 = 20 if x is the weight of the new person , total increase in weight = x − 50 = > 20 = x - 50 = > x = 20 + 50 = 70 answer : a"
Answer: A