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Paha777 [63]
3 years ago
7

In a batch of 440 water purifiers, 8 were found to be defective. What is the probability that a water purifier chosen at random

will be defective?
Write the probability as a percent. Round to the nearest tenth of a percent if necessary.
Mathematics
1 answer:
Gemiola [76]3 years ago
3 0

Answer:

55

Step-by-step explanation:

440/8

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Which of the following statements best describes the value of the expression 12x + 12, when x = 8?
miss Akunina [59]

if x is 8 then 12(8) + 12

12 times 8 is 96

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the answer is 108

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3 years ago
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Eric's class consists of 12 males and 16 females. If 3 students are selected at random, find the probability that they
Reptile [31]

Answer:

The probability that all are male of choosing '3' students

P(E) = 0.067 = 6.71%

Step-by-step explanation:

Let 'M' be the event of selecting males n(M) = 12

Number of ways of choosing 3 students From all males and females

n(M) = 28C_{3} = \frac{28!}{(28-3)!3!} =\frac{28 X 27 X 26}{3 X 2 X 1 } = 3,276

Number of ways of choosing 3 students From all males

n(M) = 12C_{3} = \frac{12!}{(12-3)!3!} =\frac{12 X 11 X 10}{3 X 2 X 1 } =220

The probability that all are male of choosing '3' students

P(E) = \frac{n(M)}{n(S)} = \frac{12 C_{3} }{28 C_{3} }

P(E) =  \frac{12 C_{3} }{28 C_{3} } = \frac{220}{3276}

P(E) = 0.067 = 6.71%

<u><em>Final answer</em></u>:-

The probability that all are male of choosing '3' students

P(E) = 0.067 = 6.71%

3 0
4 years ago
Expand $\left(x^2 \frac{1}{x}\right)^3$. (Write the terms with higher degree first, so for example an $x^2$ term would come befo
Ilya [14]

Answer:

x^6+3x^3+3+\dfrac{1}{x^3}

Step-by-step explanation:

We can use the pascal triangle to find the coefficients of the expasion of the cube. It holds that

(x^2 + \dfrac{1}{x})^3=(x^2)^3+3(x^2)^2\dfrac{1}{x}+3x^2(\dfrac{1}{x})^2+(\dfrac{1}{x})^3\\\\=x^6+3x^4\dfrac{1}{x}+3x^2\dfrac{1}{x^2}+\dfrac{1}{x^3}\\\\=x^6+3x^3+3+\dfrac{1}{x^3}

4 0
4 years ago
67 times a number minus 58 is equal to 36 less than the number
marusya05 [52]
67n - 58 = n - 36

hope this helps, have a great day!

6 0
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The cost for a hot dog and soft drink at a ballpark is $5.00. If the soft drink costs $2.50 less than the hot dog, find the cost
Elina [12.6K]

Answer:

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Step-by-step explanation:

3.75 + 1.25 = 5.00

Difference

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Hope this helps

8 0
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