Maths Olympiad Prep

Library / /252 of 434

, 2022

Geometry Difficulty 1.4 Junior Find the answer Canada

For the points in the diagram, which statement is true?

Figure 0

Pick one

Solution

In $1.00 worth of dimes, there are $1.00$0.10=10\dfrac{\$1.00}{\$0.10}=10 dimes.

In $1.00 worth of quarters, there are $1.00$0.25=4\dfrac{\$1.00}{\$0.25}=4 quarters.

The jar contains 10 dimes and a total of 10+4=1410+4=14 coins.

If Terry randomly removes one coin from the jar, the probability that it
is a dime is 1014=57\dfrac{10}{14}=\dfrac{5}{7}.

Figure for this problem

Want a route through all this instead of an archive? The track puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.

Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project.