Question

6. The expected life of a calculator varies inversely with the amount of times a student

drops it. If the expected life of a calculator is 625 days and has been dropped 8 times,
what is the expected life of a calculator dropped 20 times?

Answer 1

9514 1404 393

Answer:

250 days

Explanation:

If the number of drops increases by a factor of 20/8, the expected life will decrease by the inverse of that factor: 8/20.

The expected life is (8/20)(625 days) = 250 days.