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2 years ago

Question One:

Mathematics

1 answer:

Jobisdone [24]2 years ago

8 0

Probability that 2 of the 10 chargers will be defective =0.35

Number of ways of selecting 10 chargers from 20 chargers is 20C10

20C10 = 184756

Number of ways of selecting 10 chargers from 20 = 184756

Number of ways of selecting 2 defective chargers from 5 defective chargers = 5C2

5C2 = 10

Since 2 defective chargers have been chosen, there remains 8 to choose

Number of ways of selecting 8 good chargers from 15 remaining chargers = 15C8

Number of ways of selecting 8 good chargers from 15 remaining chargers = 6435

Probability that 2 of the 10 will be defective =

(10x6435)/184756

Probability that 2 of the 10 will be defective = 64350/184756

Probability that 2 of the 10 chargers will be defective =0.35

Learn more on probability here: brainly.com/question/24756209

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2 years ago

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Rudiy27

Use these equations when converting polar equations to parametric equations:

$x=r\cos\theta$

$y=r\sin\theta$

We know that $r=5\theta$ , so substitute that into both equations for x and y.

$x=5\theta\cos\theta$

$y=5\theta\sin\theta$

Now, replace $\theta$ with any variable that you want to represent the parametric equations in. I'll use the standard variable, $t$

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Thus, $r=5\theta$ represented in parametric form is:

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Let me know if you need any clarifications, thanks!

~ Padoru

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3 years ago

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Viefleur [7K]

Given:

The inequality is

$3|p+4|+5$

To find:

The solution set for the given inequality.

Solution:

We have,

$3|p+4|+5$

$3|p+4|$

Divide both sides by 3.

$|p+4|$

It can be written as

$-1$

Subtracting 4 from each side, we get

$-1-4$

$-5$

The solution set of the given inequality is (-5,-3).

Therefore, the correct option is A.

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Answer:

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