Question

The cost per student, c, needed for the class trip varies inversely as the number of students, s, going on the trip. If the trip costs $8 per student if 60 students go on the class trip, how much would it cost per student if 75 students go?

Answer 1

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Answer:

$6.40

Explanation:

The number of students is increased by the factor of 75/60 = 5/4. The cost is inversely proportional to that, so is ...

$8 × 4/5 = $6.40

The per-student cost for 75 students is $6.40.