Difference between revisions of "1985 AJHSME Problem 18"
Coolmath34 (talk | contribs) (Created page with "== Problem == Nine copies of a certain pamphlet cost less than <math>\$10.00</math> while ten copies of the same pamphlet (at the same price) cost more than <math>\$11.00</mat...") |
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<math>\text{(E)}</math> <math>\$1.11</math> | <math>\text{(E)}</math> <math>\$1.11</math> | ||
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+ | ==In-depth Solution by BoundlessBrain!== | ||
+ | https://youtu.be/pZdArd1FSYA | ||
== Solution== | == Solution== |
Latest revision as of 16:03, 4 July 2023
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