Final answer:
To determine the point of indifference between the current mode of operation and the new option for the school, we compare the total costs and revenues for both scenarios. Using this comparison, the school will be indifferent when it has 20 students.
Step-by-step explanation:
To determine at what point the school will be indifferent between its current mode of operation and the new option, we need to compare the total costs and total revenues for both scenarios.
Current mode of operation: The total cost per student is the sum of fixed costs and variable costs, which is ($6,000 + $5,000 + $1,000) + ($90) = $12,090 per student per month. The total revenue per student is $700 per month.
New option: The total cost per student is the sum of fixed costs and variable costs, which is ($10,000 + $6,000 + $2,000) + ($150) = $18,150 per student per month. The total revenue per student is $1,000 per month.
To find the point of indifference, we set the total costs equal to the total revenues:
$12,090 = $700x
$18,150 = $1,000x
Solving for x gives:
x ≈ 17.2717 (approximately)
Since the number of students cannot be fractional, the school will be indifferent between its current mode of operation and the new option when it has 17 or 18 students. Therefore, the correct answer is 2) 20.