Answer: Option 'C' and 'B' are correct.
Step-by-step explanation:
Since we have given that

In Option 'C' ,
Length of a poster is given by

Width of a poster is given by

So, Area of poster is given by

In option 'B', part of dolls are within the original box is given by

Part of dolls who has charity is given by

Total dolls she donate is given by

On the other hand, In option 'A' has "Division operation" and option 'D' has "Subtraction operation".
Hence, Option 'C' and 'B' are correct.