Cayley 2023 Part A - Question 8, CEMC UWaterloo
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Difficulty: 2
This problem is tagged with cayley, cayley23, highschool.
(Cayley 2023, Part A, Question 8, CEMC - UWaterloo)
Charlie is making a necklace with yellow beads and green beads. She has already used $4$ green beads and $0$ yellow beads. How many yellow beads will she have to add so that $\frac{4}{5}$ of the total number of beads are yellow?
$(A)$ $16$
$(B)$ $4$
$(C)$ $20$
$(D)$ $24$
$(E)$ $12$
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Your answer should be a single capital letter, e.g. 'A'.
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