The Life of a Light Bulb Is Exponentially Distributed with a Mean

question 47

Multiple Choice

The life of a light bulb is exponentially distributed with a mean of 1,000 hours. What is the probability that the bulb will last more than 1,200 hours?

• A) .3012
• B) .3679
• C) .4345
• D) .6988

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Definitions:

Potassium

A chemical element with the symbol K, essential for many processes in organisms, especially in nerve function.

Presynaptic Neuron

The neuron that sends a signal across a synapse to another neuron, typically by releasing neurotransmitters.

Postsynaptic Neuron

A neuron that receives a signal from and is located directly downstream of the synapse in neuronal communication.

Neurotransmitters

Chemical substances that transmit signals across a synapse from one neuron to another neuron, muscle, or gland cell.