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gregori [183]
3 years ago
8

Find the ratio of black cell phone covers sold to the total number of cell phones covers sold last week. Then explain its meanin

g = info below
Green Cover :5
Silver Cover:6
Red Cover:3
Black Cover:4
Mathematics
2 answers:
finlep [7]3 years ago
5 0
The ratio here would be 4 to 18, in which 4 represents the number of black covers sold and 18 represents the total of covers sold.
dimulka [17.4K]3 years ago
3 0

The <em><u>correct answer</u></em> is:

4:18, which means that 4 out of every 18 covers sold are black.

Explanation:

To find the ratio of black cases to total, we must first find the total number of cases sold: 5+6+3+4 = 18.

This makes the ratio of black to total 4:18.

The explanation is that 4 cases out of every 18 will be black.

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54 ÷ ( 8 - 5 )<br><br><br><br>full explanation too please​
Tresset [83]

Use order of operations.
First step do inside the parentheses

8-5 = 3


Now you have 54 / 3


Now divide

54/3 = 18


answer: 18

5 0
2 years ago
Read 2 more answers
Suppose I work on a factory line doing quality control work. Since I've been working here for such a long time, I am fairly conf
Dmitriy789 [7]

Answer:

Step-by-step explanation:

a) It is a binomial distribution.

n = 25

p = 0.15

b) mean = np = 25 * 0.15 = 3.75

   variance = np(1 - p)

                 = 25 * 0.15 * (1 - 0.15)

                 = 3.1875

c) P(X = x) = nCx * px * (1 - p)n - x

P(X < 4) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3)

            = 25C0 * (0.15)^0 * (0.85)^25 + 25C1 * (0.15)^1 * (0.85)^24 + 25C2 * (0.15)^2 * (0.85)^23 + 25C3 * (0.15)^3 * (0.85)^22 = 0.4711

d) P(X = 3) = 25C3 * (0.15)^3 * (0.85)^22 = 0.2174

8 0
3 years ago
Suppose you just received a shipment of twelve televisions. Three of the televisions are defective. If two televisions are rando
qwelly [4]

Answer: The probability that both televisions work is 0.5625 .

The probability at least one of the two televisions does not​ work is 0.4375.

Step-by-step explanation:

Given : Number of televisions received in shipment= 12

Number of defective televisions received in shipment= 3

Then proportion of defective televisions =\dfrac{3}{12}=0.25

Using binomial probability formula, the probability of getting success in x trials is given by :-

P(x)=^nC_xp^x(1-p)^{n-x}

If two televisions are randomly​ selected, then the probability that both televisions work will be :-

P(0)=^2C_0(0.25)^0(0.75)^2=(0.75)^2=0.5625

The probability at least one of the two televisions does not​ work will be :-

P(x\geq1)=1-P(0)=1-0.5625=0.4375

6 0
3 years ago
Mika wants to buy a condominium. He has the choice of buying it now or renting it with the option to buy at the end of 3 years.
mixer [17]

Answer:

Step-by-step explanation:

 

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5 0
3 years ago
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Olin [163]

Answer:

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Step-by-step explanation:

Collect like terms

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4 0
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