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2 years ago

May I please receive help?

Mathematics

1 answer:

Natalija [7]2 years ago

6 0

Answer:

<h2>Line 1 and line 2: ●Parallel ○Perpendicular ○Nether</h2><h2>Line 1 and line 3: ○Parallel ○Perpendicular ●Nether</h2><h2>Line 2 and line 3: ○Parallel ●Perpendicular ○Nether</h2>

<h2>The Black circle is the answer</h2>

hope you add brainliest and 5 stras

<h2>Step-by-step explanation:</h2><h2>Goodbluck</h2>

dont forget add brainliest

and 5 stars

<h2>THANK YOU!!!</h2>

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zubka84 [21]

Answer:

P(B)= 17/20

Step-by-step explanation:

Hello!

The audience of the magic show is conformed by a total of 120 people, 52 of which are female and 68 are men.

Within the audience there is a school class of 37, of these students, 17 are female and 20 are male.

If a random member of the audience is selected as a volunteer:

Let "A" represent the event that "the selected volunteer is a student of the class"

And "B" the event that "the selected student is female"

You have to calculate the probability of the selected volunteer being female, given that it is a member of the school class.

Symbolically:

P(B|A)

Using the formula of conditional probabilities you can calculate it as:

$P(B|A)= \frac{P(AnB)}{P(A)}$

P(A∩B)= $P(A)*P(B)= (\frac{37}{120} )*(\frac{17}{20} )$ = $\frac{629}{2400}= 0.26$

$P(A)= \frac{37}{120} = 0.308$

$P(B|A)= \frac{P(AnB)}{P(A)}= \frac{629/2400}{37/120} = \frac{17}{20} = 0.85$

As you can see the probability of the event "The volunteer is female given that it was a student of the school class" means that you already know the selected volunteer was a student and only needed to calculate the probability of that student being female.

P(B)= 17/20

I hope this helps!

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