General Aptitude TestNumerical AbilityAverage

The average of D1 and D2 is 40. The average of D2 and D3 is 45. The a…

The average of D₁ and D₂ is 40. The average of D₂ and D₃ is 45. The average of D₁ and D₃ is 55. What is the value of D₃ ?

Answer & explanation

Correct answer: option 4

Sum of D₁ & D₂ = 2 × 40 = 80

Sum of D₂& D₃ = 2 × 45 = 90

Sum of D₁ & D₃ = 2 × 55 = 110

By observing all ,

2(D₁ + D₂ + D₃) = 110 + 90 + 80 = 280

D₁ + D₂ + D₃ = 140

80 + D₃ = 140

D₃ = 60

So , Value of D₃ is 60