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2 years ago

I NEED HELP FASTTT D:

Mathematics

1 answer:

Doss [256]2 years ago

4 0

Answer:

12x + 15 = 12x - 15

Step-by-step explanation:

-5x - 25 = 5x + 25

-25 = 10x + 25

-50 = 10x

-5 = x

12x + 15 = 12x - 15

15 = -15 ( No solution )

12x + 15 = 3(4x + 5)

12x + 15 = 12x + 15

12x = 12x

0 = 0 ( True for all x's )

7x + 21 = 21

7x = 0

x = 0

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Approximately 5% of calculators coming out of the production lines have a defect. Fifty calculators are randomly selected from t

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0.2611 = 26.11% probability that exactly 2 calculators are defective.

Step-by-step explanation:

For each calculator, there are only two possible outcomes. Either it is defective, or it is not. The probability of a calculator being defective is independent of any other calculator, which means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

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$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

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This means that $p = 0.05$

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This means that $n = 50$

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3 years ago

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