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Svet_ta [14]
3 years ago
7

A bag contains 6 white marblesw and 4 black marbles.a marble is drawn from the bag and then a second marble is drawn without rep

lacing the first one. what is the probability of drawing a white marble on the first draw and another white marble on the second draw
Mathematics
2 answers:
Katena32 [7]3 years ago
8 0

Answer:

60.5%

Step-by-step explanation:

60% white, 40% black

The first draw you have a 60% chance drawing a white marble, the second time you have a 55% chance since you already drew one in the first round. so i think it is 60.5%% chance drawing white on both rounds since I add 60+55=121. 121/200=60.5%

Katen [24]3 years ago
3 0

Answer:

1/3

Step-by-step explanation:

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Step-by-step explanation:

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  B

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3 years ago
The scale of a map is 5 mm = 2 feet. What is the map distance if the actual distance is 50 feet. BE SURE TO LABEL!
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A boat can travel at an average speed of 10 miles per hour in still water. Traveling with the current, it can travel 6 miles in
oksano4ka [1.4K]

Answer: The speed of the current is 2 miles per hour.

Step-by-step explanation:

We know that the speed of the boat is:

S = 10 mph.

When the boat travels with the current, the speed will be:

S = 10mph + x

where x = speed of the current.

When the boat travels against the current, the speed will be:

S = 10mph - x

Now, for a given amount of time T, when the boat travels with the current, it moves a distance of 6 miles.

Then we have the equation:

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And against the current, in the same time the boat moves 4 mi, then:

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Then we have the system of equations:

(10mph + x)*T = 6mi

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Now, we can take the quotient of these two equations and get:

((10mph + x)*T)/((10 mph - x)*T) = (6mi/4mi)

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Now we can solve this for x.

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3 years ago
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