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Part ACSIR NET June 2024at-least-one-complement

At least one complement

The length of bristlemouth fish is uniformly distributed between 2 and 4 inches. If a fisherman randomly catches 5 bristlemouth fishes, what is the probability that at least one of them will be 3 inches or longer?

  1. A.0.03125
  2. B.0.15625
  3. C.0.84375
  4. D.0.96875✓

You have the answer. Trap Analysis is why the other three were written.

Not a worked solution repeated four times — the specific reasoning error each wrong option was built to reward.

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