Answer:
6 kg nuts and 9kg of raisins
Step-by-step explanation:
We know that the price must be (2.5x + 3.75y)/15 = 3.00 and x+y = 15. To solve this system of equations, we can say that x = 15-y. We plug this back into the equation to get
( 2.5(15-y) + 3.75y) ) / 15 = 3.00
y = 6
to find x
x = 15 - 6 = 9
6 kg nuts and 9kg of raisins
