Answer:
To solve this problem, we need to calculate the cost of each travel and instruction option and then determine which options Treena can afford with her $1000 scholarship.
Option 1: Air travel and individual instruction
Travel cost: $335
Instruction cost: 7 x $60 = $420
Total cost: $335 + $420 = $755
Option 2: Air travel and group instruction
Travel cost: $335
Instruction cost: 7 x $40 = $280
Total cost: $335 + $280 = $615
Option 3: Train travel and individual instruction
Travel cost: $125
Instruction cost: 7 x $60 = $420
Total cost: $125 + $420 = $545
Option 4: Train travel and group instruction
Travel cost: $125
Instruction cost: 7 x $40 = $280
Total cost: $125 + $280 = $405
Now we need to determine which options Treena can afford with her $1000 scholarship. We'll start with the most expensive option and work our way down.
Option 1: $755
This option is too expensive for Treena's $1000 scholarship.
Option 2: $615
This option is also too expensive for Treena's $1000 scholarship.
Option 3: $545
This option is within Treena's budget, but she won't have any money left for food.
Option 4: $405
This option is also within Treena's budget, and she'll have $595 left for food.
Therefore, Treena's choices of travel and instruction plans that she could afford to make are:
- Train travel and group instruction with $595 left for food
- Train travel and individual instruction with no money left for food