Find the Indicated Probability $$\mathrm { f } ( \mathrm { x } ) = \mathrm { e } ^ { - \mathrm { x } ; } ; [ 0 , \infty ) , \mathrm { P } ( \mathrm { x } \geq 7 )$$

question 266

Multiple Choice

Find the indicated probability.
- $$\mathrm { f } ( \mathrm { x } ) = \mathrm { e } ^ { - \mathrm { x } ; } ; [ 0 , \infty ) , \mathrm { P } ( \mathrm { x } \geq 7 )$$

• A) \(0.9991\)
• B) 0
• C) \(0.0009\)
• D) The function \(\mathrm { f } ( \mathrm { x } )\) is not a probability density function.

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