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ra1l [238]
3 years ago
14

You have a bag that contains 20 quarters, 20 dimes, and 15 nickels. When randomly selecting two coins with no replacement find t

he following probabilities.
P(2 Quarters)
Mathematics
1 answer:
iogann1982 [59]3 years ago
4 0

Answer:

P(2 quarters) = 19/ (13*16) = 19/208  = 0.0913

Step-by-step explanation:

probability of getting 2 quarters?

ok

first draw:  there are 20 quarters to choose from

second draw: there are 19 quarters left to choose

so Total coins are 65 coins

P(2 quarters) = P( 1st quarter)* P(2nd quarter)

P(2 quarters) =  20/65   *   (19/64)

P(2 quarters) = 4/13 *  19/64

P(2 quarters) = 19/ (13*16) = 19/208

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Answer:

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Step-by-step explanation:

2a + 3b = 5

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You can write this another way:

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Now you gotta factor out:

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Now if you divide by 5, you get: a = 4

Now you can fill in the second formula again

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b = 4 - 5 = -1

So, this makes:

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