In a coconut grove, (x + 3) trees yield 60 nuts per year, x trees yield 120 nuts per year and (x – 3) trees yield 180 nuts per year. If the average yield per year per tree be 100, find x.
Choose the correct choice from the following answers:	A) 3	B) 4	C) 5	D) 6	E) None of the above
(x+3)×60+x×120+(x−3)×180/(x+3)+x+(x−3)=100   ⇒ 360x−360/3x = 100   ⇒ 60x = 360 ⇒ x = 6   Answer 6
<result>D</result>
In a coconut grove, (x + 3) trees yield 60 nuts per year, x trees yield 120 nuts per year and (x – 3) trees yield 180 nuts per year. If the average yield per year per tree be 100, find x.