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Reil [10]
3 years ago
12

what is the probability of randomly choosing a penny and a nickel from a cup of coins that contains a penny nickel a dime and a

quarter
Mathematics
1 answer:
Serjik [45]3 years ago
4 0
There are  4 coins in the  cup.

Prob( choosing first a penny then a nickel) = 1/4 * 1/3  = 1/12

Prob(choosing first a nickel then a penny) = 1/4 * 1/3 = 1/12

Required probability  =1/12 + 1/12  = 1/6 Answer


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6 0
3 years ago
What type of association would you expect to see between the amount of fog in the sky and the distance that a pilot can see? A)
Blizzard [7]
We can make a conclusion that the more fog there is, the less distance the pilot can see. this means that there is a negative association because if this were graphed, the slop would be negative, as the x-axis (amount of fog) increases and the y-axis (distance pilot can see) decreases.
7 0
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Nemo's aquarium is filled with 2,4002{,}400 2,400 2, comma, 400 cubic centimeters of water. The base of the aquarium is 20 cm 20
kolezko [41]

The water in the aquarium is a rectangular prism with dimensions 20, 12 and h (where the height is unknown).

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6 0
2 years ago
A family is relocating from St. Louis, Missouri, to California. Due to an increasing inventory of houses in St. Louis, it is tak
Dafna1 [17]

Answer:

a. Assume that the population has a normal distribution.

b. The 90% confidence interval of the mean sale time for all homes in the neighborhood is between 219.31 days and 240.69 days.

Step-by-step explanation:

Question a:

We have to assume normality.

Question b:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.9}{2} = 0.05

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.05 = 0.95, so Z = 1.645.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.645\frac{35}{\sqrt{29}} = 10.69

The lower end of the interval is the sample mean subtracted by M. So it is 230 - 10.69 = 219.31 days.

The upper end of the interval is the sample mean added to M. So it is 230 + 10.69 = 240.69 days.

The 90% confidence interval of the mean sale time for all homes in the neighborhood is between 219.31 days and 240.69 days.

7 0
3 years ago
What is the nearest degree ?
gtnhenbr [62]

Answer:

maybe 65 degrees

sorry if its wrong

6 0
3 years ago
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