Final answer:
To find the cost of one medium popcorn when the total cost for three is $19.75, divide $19.75 by 3, resulting in approximately $6.58 per popcorn.
Step-by-step explanation:
The question posed by the student involves calculating the cost of individual items given the total cost for a group of items, which is a basic arithmetic problem. In this case, the student would like to know the cost of one medium popcorn if the Robinson family pays $19.75 for 3 medium popcorns at the movie theatre. To solve this, you divide the total cost by the number of popcorns:
Determine the total cost paid for the popcorns: $19.75.
- Count the number of popcorns: 3.
- Divide the total cost by the number of popcorns to find the cost per popcorn: $19.75 / 3 = $6.58 (assuming we round to the nearest cent).
Therefore, each medium popcorn costs approximately $6.58.