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3 years ago

A $34 item is marked down by 90%. What is the cost of the new item?

Mathematics

2 answers:

Monica [59]3 years ago

8 0

The answer is 4.6 pls brainliest

guajiro [1.7K]3 years ago

8 0

Answer:

3.4

Step-by-step explanation:

divide the whole number by the objects in the group

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The following are the last 7 days adjusted closing stock prices (in $) for Citigroup: 22, 25, 20, 15, 40, 55, 28 A) Compute the

son4ous [18]

Answer:

(A) The 25th percentile is 20.

(B) The mean of the data set is 20 and the median of the data set is 25. The data set is left-skewed.

Step-by-step explanation:

The data set arranged in ascending order is:

S = {15, 20, 22, 25, 28, 40, 55}

(A)

Compute the 25th percentile as follows:

$25^{th} \text{Percentile}=[\frac{n+1}{4}]^{th}obs.\\\\=[\frac{7+1}{4}]^{th}obs.\\\\=2^{nd}obs.\\\\=20$

Thus, the 25th percentile is 20. This value implies that exactly 25% of the observations are less than 20.

(B)

Compute the sample mean as follows:

$\text{Mean}=\frac{22+25+20+15+40+55+28}{7}=\frac{205}{7}=29.29$

Compute the median as follows:

For a set with odd number of observations, the median value if the middle value.

The middle value is 25.

Thus, the mean of the data set is 20 and the median of the data set is 25.

The Mean < Median.

This implies that the data set is left-skewed.

4 0

3 years ago

Helppp plzz I will give brainlist

ra1l [238]

#1. look at the individual probability first.
A dice has 6 sides. The numbers > 2 are {3, 4, 5, 6}. So the chance of rolling a number > 2 is 4/6 or 2/3 simplified.
Multiples of 3 on a dice are {3, 6}. So the chance of rolling a multiple of 3 is 2/6 or 1/3 simplified.

Rolling a dice is an independent event, like flipping a coin the previous roll does not have an effect on the outcome of the next roll. So when you see the word AND connecting the outcomes, you multiply them.

Prob of rolling >2 AND then multiple of 3 = (2/3)*(1/3)
= 2/9

#2. The total socks in the drawer: 8+8+4= 20 socks
The probability of first drawing a blue sock is 8/20 or 2/5 simplified.

Since the question does not say the socks are put back in the drawer, the total number of socks and number of blue socks decrease by 1 after the first draw. This makes the next draw dependent on the first.
The probability of drawing a blue sock is then: 7/19
because there's a blue sock missing.

Probability of drawing blue sock AND then a blue sock (without replacement)
= (2/5)*(7/19)
= 14/95

8 0

4 years ago

80 volunteers take a meningitis test to help doctors see how accurate this test is at identifying whether someone has meningitis

lubasha [3.4K]

Using it's formula, considering the results, it is found that the accuracy of the test is of 0.95 = 95%.

<h3>What is the accuracy of a test?</h3>

It is given by the <u>number of correct results divided by the number of tests</u>.

In this problem, there were 80 tests, of which 80 - 2 - 2 = 76 had correct results, hence the accuracy is given by:

A = 76/80 = 0.95 = 95%.

More can be learned about the accuracy of a test at brainly.com/question/3128152

#SPJ1

4 0

2 years ago

4 1/2 cups of flour to make 4 fruit cakes how many cups of flour are needed for one fruitcake

Nikitich [7]

Answer:

1 and 1/8

Step-by-step explanation:

I am pretty sure because I did the math

5 0

3 years ago

What is the value of n? 133, 142, n

Umnica [9.8K]

I assume that this is a sequence and you need to find the next number in the sequence.

The first two numbers are give as 133 and 142, we can get the difference between them by subtraction as follows:
142 - 133 = 9
This means that adding 9 will generate the next term as follows:
133
133+9 = 142
142 + 9 = 151
This means that : n=151

3 0

3 years ago

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