Given information:
- Volume of drink = 120 ml
- Drink is half alcohol and half water by mass
- Initial temperature of the drink = 25°C
- Mass of ice added = 20 g
- Temperature of ice = 0°C
- Density of drink = 0.833 g/ml
- Specific heat of alcohol = 0.6 cal/g/°C

Approach:
To find the final temperature of the drink, we need to calculate the amount of heat transferred during the cooling process. The heat transferred can be calculated using the formula:

Q = mcΔT

where Q is the heat transferred, m is the mass, c is the specific heat, and ΔT is the change in temperature.

Calculations:

Step 1: Calculate the mass of the drink
Mass of drink = Volume of drink x Density of drink
Mass of drink = 120 ml x 0.833 g/ml
Mass of drink = 99.96 g

Step 2: Calculate the initial mass of alcohol and water in the drink
Since the drink is half alcohol and half water by mass, the initial mass of alcohol and water in the drink is equal.
Initial mass of alcohol = Initial mass of water = Mass of drink / 2
Initial mass of alcohol = 99.96 g / 2
Initial mass of alcohol = 49.98 g
Initial mass of water = 49.98 g

Step 3: Calculate the heat transferred from the drink to the ice
Heat transferred from the drink = Heat gained by the ice
Q(drink) = Q(ice)

Q(drink) = mcΔT(drink)
Q(ice) = mcΔT(ice)

Since the ice melts, the final temperature of the ice will be 0°C.

Q(drink) = Q(ice)
m(drink)c(drink)ΔT(drink) = m(ice)c(ice)ΔT(ice)
(mass of alcohol + mass of water)c(drink)ΔT(drink) = mass of ice x c(ice) x ΔT(ice)

Step 4: Substitute the values into the equation
(49.98 g + 49.98 g) x 0.6 cal/g/°C x (25°C - final temperature of the drink) = 20 g x 1 cal/g/°C x (0°C - 0°C)

Simplifying the equation:
(99.96 g) x 0.6 cal/g/°C x (25°C - final temperature of the drink) = 0

Step 5: Solve for the final temperature of the drink
99.96 x 0.6 x (25 - final temperature of the drink) = 0
59.976 x (25 - final temperature of the drink) = 0
1499.4 - 59.976 x final temperature of the drink = 0
-59.976 x final temperature of the drink = -1499.4
final temperature of the drink = -1499.4 / -59.976
final temperature of the drink ≈ 25°C

Result:
The final

If all ice melts then temperature is 4 degree celcius