There Are 10 Rolls of Film in a Box and 3

question 51

Multiple Choice

There are 10 rolls of film in a box and 3 are defective. Two rolls are to be selected one after the other. What is the probability of selecting a defective roll followed by another defective roll?

• A) 1/2 or 0.50
• B) 1/4 or 0.25
• C) 1/120, or about 0.0083
• D) 1/15, or about 0.07

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Definitions:

Meta-analysis

A statistical technique that combines the results of multiple scientific studies to identify patterns, differences, or effects that the individual studies may be too small to detect on their own.

Statistical Significance

A mathematical measure indicating that the observed results are not likely due to chance, supporting the hypothesis being tested.

Estimated

Approximated or calculated based on available information or data, often used in the context of measurements or quantifications.

Mortality

The state of being subject to death; often used statistically to refer to the rate of death in a population.