 
<translate> Ọ bụrụ na anyị chọrọ ịgbanwe nkezi afọ nke otu nwere mmadụ 4 site na 40 ruo 38 site na ịgbakwunye otu onye. Afọ ole ka onye ọhụrụ e tinyere n'ìgwè ahụ kwesịrị ịdị? Nhọrọ: (A) 20 (B) 25 (C) 30 (D) 38 (E) 40 Ọ dị mma. Ka anyị chee echiche. Echiche ụfọdụ na-enweghị isi mbụ: <eng> If we need to change the average age of a group containing 4 persons from 40 to 38 by adding a person. What should be the age of the person newly added to the group?
Options:
(A) 20
(B) 25
(C) 30
(D) 38
(E) 40 OK. Let's think. Some random thoughts first: 