In a coconut grove, (x + 2) trees yield 60 nuts per year, x trees yield 120 nuts per year and (x – 2) trees yield 180 nuts per year. If the average yield per year per tree be 100, find x.
Select the correct option.
A) 3 B) 4 C) 5 D) 6 E) 7
(x+2)×60+x×120+(x−2)×180 /(x+2)+x+(x−2)=100   ⇒ 360x−240 /3x = 100   ⇒ 60x = 240 ⇒ x = 4   Answer 7
<result>E</result>
In a coconut grove, (x + 2) trees yield 60 nuts per year, x trees yield 120 nuts per year and (x – 2) trees yield 180 nuts per year. If the average yield per year per tree be 100, find x.