Find the Indicated Probability

question 32

Multiple Choice

Find the indicated probability. Round to the nearest thousandth.
-A sample of 4 different calculators is randomly selected from a group containing 14 that are defective and 39 that have no defects. What is the probability that at least one of the calculators is
Defective?

• A) 0.281
• B) 0.719
• C) 0.707
• D) 0.140

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Definitions:

Volcanic Mudflows

A fast-moving flow of volcanic materials, water, and debris known as a lahar, typically associated with intense volcanic activity.

Obsidian

A generally gray to black, shiny volcanic glass, usually of felsic composition.

Andesite

A volcanic rock of intermediate composition, typically found in volcanic arcs associated with subduction zones.

Volcanic Domes

Rounded, bulbous formations of lava that accumulate near and around volcanic vents, often resulting from the slow extrusion of viscous lava.