3 years ago

In the middle of a thing :

Mathematics

1 answer:

gavmur [86]3 years ago

6 0

Answer:

Not gonna lie I don't know and this is old but plz give me brainliest.

Step-by-step explanation:

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The random variable X is exponentially distributed, where X represents the time it takes for a person to choose a birthday gift.

Karolina [17]

Answer:

0.685 = 68.5% probability that X is less than 30 minutes

Step-by-step explanation:

Exponential distribution:

The exponential probability distribution, with mean m, is described by the following equation:

$f(x) = \mu e^{-\mu x}$

In which $\mu = \frac{1}{m}$ is the decay parameter.

The probability that x is lower or equal to a is given by:

$P(X \leq x) = \int\limits^a_0 {f(x)} \, dx$

Which has the following solution:

$P(X \leq x) = 1 - e^{-\mu x}$

If X has an average value of 26 minutes

This means that $m = 26, \mu = \frac{1}{26}$

What is the probability that X is less than 30 minutes?

$P(X \leq 30) = 1 - e^{-\frac{30}{26}} = 0.685$

0.685 = 68.5% probability that X is less than 30 minutes

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3 years ago

Help! Btw thank you for helping me with so many questions:)

ser-zykov [4K]

Answer:

The answer is 1

Step-by-step explanation:

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4 years ago

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Shkiper50 [21]

Answer:

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mash [69]

Answer:

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Step-by-step explanation:

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3 years ago

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GalinKa [24]

Answer:

{12, 16, 20}

Step-by-step explanation:

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