The number of failures of a testing instrument from contamination particles on the product is a poisson random variable with a mean of 0.018 failures per hour. (a) what is the probability that the instrument does not fail in an 8-hour shift? (b) what is the probability of at least 1 failure in a 24-hour day? round your answers to four decimal places (e. g. 98.7654).

The probability that the instrument does not fail in an 8-hour shift is

The probability of at least 1 failure in a 24-hour day is

Step-by-step explanation:

The probability distribution of a Poisson random variable X representing the number of successes occurring in a given time interval or a specified region of space is given by the formula:

Let X be the number of failures of a testing instrument.

We know that the mean failures per hour.

(a) To find the probability that the instrument does not fail in an 8-hour shift, you need to:

For an 8-hour shift, the mean is

(b) To find the probability of at least 1 failure in a 24-hour day, you need to:

For a 24-hour day, the mean is

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step-by-step explanation:

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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