Find the Final Equilibrium Temperature When 20

Multiple Choice

Find the final equilibrium temperature when 20.0 g of milk at 10.0°C is added to 160 g of coffee at 90.0°C.(Assume the specific heats of coffee and milk are the same as water and neglect the heat capacity of the container,and c_water = 1.00 cal/g·°C = 4186 J/kg·°C)

A) 85.3°C
B) 81.1°C
C) 71.4°C
D) 66.7°C