1985 AJHSME Problem 18
Problem
Nine copies of a certain pamphlet cost less than while ten copies of the same pamphlet (at the same price) cost more than . How much does one copy of this pamphlet cost?
In-depth Solution by BoundlessBrain!
Solution
Let the cost of one pamphlet be Then we have and Multiply both inequalities as follows: The only answer choice that satisfies both inequalities is