Question

Twelve people purchased supplies for a ten-day camping trip with the understanding that each of the twelve will get equal daily shares. They are then joined by three more people, but make no further purchases. How many days will the supplies last if the original daily share for each person is not changed?

Answer 1

8 days.

Explanation:

There are 15 people after the 3 have joined so by proportion the number of days that the supplies will last is 12/15 ( = 4/5) of the ten days.

= 4*10 / 5

= 8 days.