An Urn Contains Three Red R Balls Numbered 1, 2

question 73

Multiple Choice

An urn contains three red R balls numbered 1, 2 and 3, four white W balls numbered 4, 5, 6 and 7, and three black B balls numbered 8, 9 and 10. A ball is drawn from the urn. What is the probability that it is red? ​

• A)P(
• R) =
• B)P(
• R) =
• C)P(
• R) =
• D)P(
• R) =
• E)P(
• R) =

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Definitions:

Resistance To Extinction

The persistence of learned behavior or response even after the original stimulus (e.g., reinforcement) is no longer present.

Spontaneous Recovery

The reappearance of a previously extinguished conditioned response after a period of time without exposure to the conditioned stimulus.

Reinforcement

A process in behavioral psychology where the probability of a behavior occurring is increased or decreased through the use of rewards or punishments.

Stimulus Discrimination

The acquired skill to distinguish between a conditioned stimulus and various other stimuli that have not been associated with an unconditioned stimulus.