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harkovskaia [24]
3 years ago
8

Some help me with this math problem

Mathematics
1 answer:
Anestetic [448]3 years ago
5 0
Only the upper-left statement is NOT true.
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A factory makes car batteries. The probability that a battery is defective is 1/14. If 400 batteries are tested, about how many
Rufina [12.5K]

Answer:

28.6, that is, about 29 are expected to be defective

Step-by-step explanation:

For each battery, there are only two possible outcomes. Either it is defective, or it is not. The probability of a battery being defective is independent of other betteries. So the binomial probability distribution is used to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected value of the binomial distribution is:

E(X) = np

The probability that a battery is defective is 1/14.

This means that p = \frac{1}{14}

400 batteries.

This means that n = 400

How many are expected to be defective?

E(X) = np = 400*\frac{1}{14} = 28.6

28.6, that is, about 29 are expected to be defective

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y=3x+3..................

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Twice the sum of 13 and x is not greater than 15
Kobotan [32]

Answer:

x = 0

Step-by-step explanation:

This is saying that 2(13x) < 15

If you have 2[13(0)] < 15

It will come to 2(0) < 15

This equals 0 < 15 which is true therefore making the <u>x</u> value = <u>0</u>

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Shapes cannot have spaces between them
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I'm sorry, but there is not enough information for me to correctly answer this question, please provide more information.


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3 years ago
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