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vredina [299]
3 years ago
11

A bag contains 3 blue coins and 9 red coins. A coin is removed at random and replaced by three of the other color. Part 1 out of

3 What is the probability that the removed coin is blue? Enter your answer as a simplified fraction. The probability that the removed coin is blue is
Mathematics
2 answers:
charle [14.2K]3 years ago
4 0

A bag contains 3 blue coins and 9 red coins. A coin is removed at random and replaced by three of the other color. Part 1 out of 3 What is the probability that the removed coin is blue?

1/4

Aloiza [94]3 years ago
3 0

Answer:

1/4

Step-by-step explanation:

Taking one coin out and replacing it with 3 other coins is the same as saying "What is the probability of picking one blue coin out of the 12 coins." Due to this, the answer should be 25%.

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Every 10 seconds, a printing company prints 50 books. How many books are printed in 1 minute?<br>​
Svetlanka [38]

Answer:

300 books

Step-by-step explanation:

10 x 6 = 1 min

50  x 6 = 300

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3 years ago
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11

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5 0
2 years ago
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The dictionary is 3 inches thick. What is the volume of the dictionary
Yuki888 [10]

Answer:

Square shaped = 27 cubic inches , Rectangular shaped = 3LW cubic Inches

Step-by-step explanation:

If the dictionary is a square ( all sides are equal ) the the volume is

      V = Length * Length * Length = L^{3}

      V = 3 * 3 * 3 = 27 inch^{3}

while if its rectangular ( all side are not equal ) shaped

      V = Length * Width * Height (thickness)

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5 0
3 years ago
When plotting sample statistics on a control chart, 99.7% of the sample statistic values are expected to fall within plus/minus
Blababa [14]

Answer:

By the Empirical Rule, \pm 3\sigma

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

The symbol of a standard deviation is \sigma. So

When plotting sample statistics on a control chart, 99.7% of the sample statistic values are expected to fall within plus/minus how many sigma?

By the Empirical Rule, \pm 3\sigma

5 0
3 years ago
The standard normal curve shown below models the population distribution of a random variable. What proportion of the values in
patriot [66]
About 32.34% of the values do not lie between the z-scores of -1.3 and 0.75.

First, we need to find the region between the z-scores.

If you look at a normal distribution table, you will get the following values:

0.75 = 77.34%
-1.3 = 9.68%

Subtraction those gives us the area between the z-scores.
77.34 - 9.68 = 67.66%

Now, just subtract that value from 100% to get the amount outside of the area.
100 - 67.66 = 32.34%
4 0
3 years ago
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