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kumpel [21]
3 years ago
11

Suppose that of all individuals buying a certain digital camera,60% include an optional memory card in their purchase, 40%includ

e an extra battery, and 30% include both a card and battery.1A randomly selected buyer is known to have purchased anextra battery. Find the probability that an optional card wasalso purchased.2A randomly selected buyer is known to have purchased anoptional card. Find the probability that an extra battery wasalso purchased.
Mathematics
1 answer:
sammy [17]3 years ago
7 0

Answer:

1A) 0.75

2A) 0.5

Step-by-step explanation:

Let A be an event of include an optional memory card

B be an event of include an extra battery

P(A) = 0.6

P(B) = 0.4

P(A and B) = 0.3

1A)  P(A|B) = P(A and B) /P(B) = 0.3 / 0.4 = 0.75

2A) P(B|A) = P(A and B)/P(A) = 0.3/0.6= 0.5

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mash [69]
<span>The perimeter is 14.47
 
Since you have 3 vertices, the polygon you have is a triangle. The sides of the triangle will be XY, XZ, and YZ. Just use the pythagorean theorem to calculate the length of each side and then add the lengths together for the result. Side XY = sqrt( (-1-3)^2 + (3-0)^2) = sqrt(16+9) = sqrt(25) = 5 Side XZ = sqrt ( (-1-(-1))^2 + (3-(-2))^2) = sqrt(0+25) = sqrt(25) = 5 Side YZ = sqrt( (3-(-1))^2 + (0-(-2))^2) = sqrt(16 + 4) = sqrt(20) = 4.47 Now add the length of each side together 5 + 5 + 4.47 = 14.47</span>
8 0
4 years ago
Jen and Ron each took five tests. Their test scores are shown below.
Molodets [167]

The  statement that correctly compares the students’ test scores is that the median of Jen's score is greater than the median of Ron's score.

<h3>How to find mean and median?</h3>

Jen and Ron each took five tests. There test score are as follow:

  • Jen: {45, 91, 84, 66, 74}
  • Ron: {70, 95, 99, 69, 72}

Let's find the mean and median of the test score to compare them correctly

Jen: {45, 66, 74, 84, 91}

mean of Jen score = 45 + 66 + 74 + 84 + 91 / 5

mean of Jen score= 360 / 5

mean of  Jen score = 72

Median of  Jen score = 74

Ron: {69, 70, 72, 95, 99}

mean of Ron score = 69 + 70 + 72 + 95 + 99 / 5

mean of Ron score = 405 / 5

mean of Ron score = 81

median of Ron score = 72

Therefore, the median of Jen's score is greater than the median of Ron's score.

learn more on mean and median here: brainly.com/question/27388918

#SPJ1

7 0
1 year ago
Write a word pharse to representbthe numerical expression below. 4+(27-10)
Aleksandr-060686 [28]
Twenty seven minus ten plus four
7 0
3 years ago
Which operation between two polynomials will not always result in a polynomial?
Assoli18 [71]
In order to build a polynomial we need one or more terms. A term is a number, variable (denoted by a letter) or any combination of numbers and variables held together by multiplication. The following are examples of terms:

5, 3x, -5ab c^{2},  \frac{2x^{3}y }{5},  x^{6}

Now it might look like one of those involves division but it can be thought of as multiplication by (2/5). When we do this the exponents must be positive.

Polynomials are expressions made up of terms held together by addition and subtraction. Again, the exponents must be positive. Since polynomials are made up of the sum or difference of terms, adding or subtracting polynomials just leads to more polynomials. Here are some examples of Polynomials:

4xy-3 x^{2} +7,  \frac{2x}{5}-3abc-5j

Now let’s consider what happens if we multiply polynomials. As an example we use: (x+5)(2x-y)=2 x^{2} +10x-xy-5y

What you might notice is that multiplication will lead us to multiply terms (but multiplying terms gives us more term,as) and also to add or subtract terms but that just gives more polynomials. Therefore multiplication leads to more polynomials.

Finally, we consider division. Here a simple example will do the trick: 2 is a term and x is a term. Let us divide 2 by x. We get: \frac{\2}{x}=2 x^{-1}  which is not a polynomial because we have a negative exponent. 

Thus, the answer to your question is division. Division of polynomials will not always result in a polynomial.

_______END OF ANSWER___________
 is. 
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3 years ago
List three measurements
almond37 [142]
1 inch
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4 years ago
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