Subject :IMO Class : Class 7

** In a coconut grove, ( x + 2) trees yield 60 nuts per year each, x trees yield 120 nuts per year each and (x - 2) trees yield 180 nuts per year each. If the average yield per year per tree be 100, then x is ______.**

(A) 4

(B) 3

(C) 2

(D) 1

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