math
posted by jillybean .
a large jar contains 500 identical marbles. Suppose you have an identical empty jar, a set of standard masses and balance scales. How would you find the mass of one marble without opening or breaking the jar? Explain
Thanks for your help, this stumped me for sure.

I would weigh the empty jar. then weigh the jar with marbles. Subtract the weight of the empty jar from the weight of the full jar. divide the remaining weight by 500 to find how much each marble weighs.