Answer:
1/4 of the full container remains
Step-by-step explanation:
Step 1: Half the milk is poured out
i.e 1/2 of the milk remains
Step 2: 1/3 of what remains is poured out --> 2/3 of the remaining is not poured out.
Hence amount remaining after step 2 = 2/3 x 1/2 = 1/3 of the total
Step 3: 1/4 of what remains is poured out --> 3/4 of the remaining is not poured out.
Hence amount remaining after step 3 = 3/4 x 1/3 = 1/4 of the full container remains