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LiRa [457]
3 years ago
13

max has 50 songs on his MP4 player. if he picks a song at random, what is the probability that the songs is a rock song?

Mathematics
2 answers:
Schach [20]3 years ago
5 0

Answer:

1/2 of the time, 50% chance

Step-by-step explanation:

barxatty [35]3 years ago
3 0

Step-by-step explanation:

Total = 50 songs

Rock = 25

Probability = Rock ÷ Total Songs

Probability = 25 ÷ 50

Probability = 1/2

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5: the data collection shows that the height to arm span has a ratio of 1 throughout you can tell this by using the line of best fit.

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2 years ago
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Yakvenalex [24]
The RF is 9. You could go to Easycalculations.com/statics/cumulative/relativefrequency to double check :)
4 0
3 years ago
Read 2 more answers
A square with an area of 64 in2 is rotated to form a cylinder. What is the radius of the cylinder?
romanna [79]
The area of the square is calculated through the equation,

                               Area = e²

where e is the measure of sides.
 
From the given,

                              64 = e²
                               e = sqrt 64 = 8 inches

The length of the side of the square rotated to form the cylinder is the diameter of the base of the cylinder. To get the radius, we divide the diameter by 2.

                             radius = 8 inches / 2 = 4 inches

Thus, the radius of the cylinder is equal to <em>4 inches</em>. 
5 0
3 years ago
Many states assess the skills of their students in various grades. One program that is available for this purpose is the Nationa
Nataly [62]

Answer:

A score of 314 is needed to be in the top 25% of students who take this exam.

Step-by-step explanation:

We are given that one of the tests provided by the NAEP assesses the reading skills of twelfth-grade students. In recent years, the national mean score was 289 and the standard deviation was 37.

Let X = <u><em>scores of the tests provided by the NAEP</em></u>

The z-score probability distribution for the normal distribution is given by;

                           Z  =  \frac{X-\mu}{\sigma}  ~ N(0,1)

where, \mu = national mean score = 289

           \sigma = standard deviation = 37

Now, we have to find how high a score is needed to be in the top 25% of students who take this exam, that means;

            P(X > x) = 0.25     {where x is the required score}

            P( \frac{X-\mu}{\sigma} > \frac{x-289}{37} ) = 0.25

            P(Z > \frac{x-289}{37} ) = 0.25

In the z table, the critial value of z that represents the top 25% of the area is given as 0.6745, that is;

                        \frac{x-289}{37}=0.6745

                        {x-289}=0.6745\times 37

                        x = 289 + 24.96 = 313.96 ≈ 314

Hence, a score of 314 is needed to be in the top 25% of students who take this exam.

7 0
3 years ago
Suppose the 3 schools have succeeded in raising
goldfiish [28.3K]

Answer:

school b

Step-by-step explanation:

it has more

8 0
3 years ago
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