DRDO Multi tasking staff Model paper 2

Let cost of 1 apple, 1 orange and 1 banana be x, y and z respectively.
⇒ 8x + 6y + 3z = 64 ---- (1)
⇒ 9x + 7y + 5z = 76 ---- (2)
⇒ 11x + 9y + 7z = 96 ---- (3)
Adding all these equations
⇒ 28x + 22y + 15z = 236 ---- (4)
Multiply equation (4) by 2
⇒ 56x + 44y + 30z = 472
So, cost of 56 apples, 44 oranges and 30 bananas is 472.