Question
The present average age of βXβ and βYβ is 45
years, present average age of βXβ and βZβ is 32 years and present average age of βYβ and βZβ is 9 years. Find the present age of βXβSolution
According to the question, Present ages of (X + Y) = 45 Γ 2 = 90β¦. (1) Than, the Present ages of (X + Z) = 32 Γ 2 = 64β¦. (2) Than, the Present ages of (Y + Z) = 12 Γ 2 = 18β¦.. (3) Therefore From equations (1), (2) and (3), we get Present ages of (X + Y + Z) = (90 + 64 + 18)/2 = 86 years Therefore From equation (3)we will get the, present age of βXβ = 86 β 18 = 68 years
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