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hoa [83]
3 years ago
11

Please help aaa

Mathematics
2 answers:
Setler79 [48]3 years ago
7 0

Answer:

13/14

Step-by-step explanation:

13/35 is the probability of drawing 2 red candies.

2/5 = 14/35 is the probability of drawing 1 red candy.

13 and 14 make 13/14.

Hope This Helps :)

timofeeve [1]3 years ago
5 0

Drawing 2 red candies without replacement is 13/35.

Probability of picking one is 2/5.


We can say that the probability of the first candy being red is 2/5

So the probability of the second candy also being red would be 13/35 divided by 2/5 which = 13/14.



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Answer:

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Step-by-step explanation:

This is what is called a "shared job" problem.

The best way to work on them is to start by finding the "portion" of the job done by each of the people in the unit of time.

So, for example, Sarah completes the project in 90 minutes, so in the unit of time (that is 1 minute) she completed 1/90 of the total project

Betty completes the project in 120 minutes, so in the unit of time (1 minute) she completes 1/120 of the total project.

We don't know how long it would take for them to complete the project when working together, so we call that time "x" (our unknown).

Now, when they work together completing the entire job in x minutes, in the unit of time they would have done 1/x of the total project.

In the unite of time, the fraction of the job done together (1/x) should equal the fraction of the job done by Sarah (1/90) plus the fraction of the job done by Betty. This in mathematical form becomes:

\frac{1}{x} =\frac{1}{90} +\frac{1}{120}\\\frac{1}{x} =\frac{4}{360} +\frac{3}{360}\\\frac{1}{x} =\frac{7}{360} \\x=\frac{360}{7} \\x=51.43\,\,min

So it will take them approximately 51.43 minutes to complete the project together.

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Step-by-step explanation:

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