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lisabon 2012 [21]
3 years ago
10

There are 10 black balls and 15 red balls in the urn. If you take out a ball, what is the probability that it is black?

Mathematics
2 answers:
Lubov Fominskaja [6]3 years ago
5 0

Answer:

2/5

Step-by-step explanation:

P(black)=10/25=2/5

trasher [3.6K]3 years ago
4 0

Answer:

nfngkfngmnfjf jvfjkfntfknddjhdhdbdbdb

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If this line is parallel to the line you've just mentioned, it will have a gradient 2/3. We know this, because when we re-arrange the equation you've given us, we get...

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So, at the moment, our parallel line looks like this...

y=(2/3)*x + C

However, you mentioned that this line passes through the point Q(1, -2). If this is the case, for the line (almost complete) above, when x=1, y=-2. With this information, we can figure out the constant of the line we want to find.

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Therefore:

C = - 2 - (2/3)

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C = - 8/3

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Let's find out if this is truly the case with a handy graphing app... Well, it turns out that I'm correct.

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saveliy_v [14]

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