2018 AMC 10B Problems/Problem 6
A box contains chips, numbered , , , , and . Chips are drawn randomly one at a time without replacement until the sum of the values drawn exceeds . What is the probability that draws are required?
Solution
Notice that the only two ways such that more than draws are required are , , , and . Notice that each of those cases has a chance, so the answer is , or .
See Also
2018 AMC 10B (Problems • Answer Key • Resources) | ||
Preceded by Problem 3 |
Followed by Problem 5 | |
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