The average weight of 10 person's increases by 4 kg when a new person comes in place of one of them weighing 70kg. What is the weight of the new person?  Choose the correct choice from the following choices
A) 85 B) 86.5 C) 90 D) 88.5 E) 110

Rationale: "total increase in weight = 10 x 4 = 40 if x is the weight of the new person , total increase in weight = x − 70 = > 40 = x - 70 = > x = 40 + 70 = 110 answer : e"
Answer: E