Krypton-85 Has a Half-Life of 10 Years

question 127

Multiple Choice

Krypton-85 has a half-life of 10 years. Approximately what percentage of Kr-85 produced from nuclear testing in 1956 still remains radioactive today?

• A) 25%
• B) 12%
• C) 6%
• D) 3%

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Definitions:

Classical Method

A traditional approach in statistical inference focusing on hypothesis testing and estimation based on fixed sample sizes.

Probabilities

Measures of how likely it is for an event to occur, represented as a number between 0 and 1, where 0 indicates impossibility and 1 indicates certainty.

Mutually Exclusive

Refers to events that cannot occur at the same time in probability theory; the occurrence of one event means the other cannot happen.

P(A ∪ B)

The probability that at least one of two events A or B occurs.