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Blizzard [7]
2 years ago
12

Some electronic devices are better used than new. The failure rate is higher when they are new than when they are six months old

. For​ example, half of the personal music players sold by a particular brand have a flaw. If the player has the​ flaw, it dies in the first six months. If it does not have this​ flaw, then only 20​% fail in the first six months. Yours dies after you had it for three months. What are the chances that it has this​ flaw?
The probability that it has the flaw is ________?
Mathematics
1 answer:
erastova [34]2 years ago
6 0

Answer:

Step-by-step explanation:

Given that half of the personal music players sold by a particular brand have a flaw. If the player has the​ flaw, it dies in the first six months. If it does not have this​ flaw, then only 20​% fail in the first six months.

Let A be the event that it fails in I 6 months

B1 = it has a flaw

B2 = it does not have a flaw

B1 and B2 are mutually exclusive and exhaustive

the chances that it has this​ flaw

=The probability that it has the flaw is

=P(A/B_1)=\frac{P(B_1/A)P(A)}{P(B_1)} \\=\frac{0.80(P(A))}{0.50}

To find P(A) = P(AB1)+P(AB2)\\=0.5(0.8)+0.5(0.2)\\=0.5

Hence required prob = 0.80

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4. Order the set of numbers from least to greatest: (4 points)
Oliga [24]

Answer:

Sorry to waist your time but no one would know this not even the person who made the question.

Step-by-step explanation:

5 0
3 years ago
A retail clothing store offers customers an opportunity to open up a credit card during checkout. One location of the retail clo
svetoff [14.1K]

A function assigns the value of each element of one set to the other specific element of another set. The total amount of credit cards opened at the two locations is given as 45+3t.

<h3>What is a Function?</h3>

A function assigns the value of each element of one set to the other specific element of another set.

Given that the number of credit cards, A, that is opened t months since January can be modeled by the function A(t) = 20 + 4t, while the number of credit cards opened at another location, B, is defined by the function B(t)=25−t.

Now, the total number of credit cards that are opened at both the location together will be,

Total number of credit cards = A(t) + B(t)

                                                = 20 + 4t + 25 - t

                                                = 20 + 25 + 4t - t

                                                = 45 + 3t

Hence, the total amount of credit cards opened at the two locations is given as 45+3t.

Learn more about Function here:

brainly.com/question/5245372

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3 0
1 year ago
Please help fast will give brainliest
MrRa [10]

Answer:

MN = 160

Step-by-step explanation:

We know that arc MN = arc NO

17g - 10 = 14g+ 20

Subtract 14g from each side

3g -10 = 14g-14g+20

3g -10 =20

Add 10 to each side

3g = 20+10

3g = 30

Divide by 3

3g/3= 30/3

g= 10

We want the arc MN

17g - 10

17(10) - 10

170 -10

160

5 0
2 years ago
Construct a frequency distribution and a frequency histogram for the data set using the indicated number of classes. Describe an
elena-s [515]

Answer and Explanation:

Number of classes = 8

    Highest value =2300

  Lowest value = 1250

Class width= highest value – lowest value / number of classes

               = 2300 – 1250/8

                = 131.25 = 132

So, we can write class as 1250+132=1382

Class                                        frequency

1250-1382                                 2

1382-1514                                 3

1514-1646                                 6

1646-1778                                 2

1778-1910                                 3

1910-2042                                 2

2042-2174                                 1

2174-2306                                 1

8 0
2 years ago
Please help me, I already answered the first 3​
Alchen [17]

Answer:

4= 29 x^{2}+6

all I know is number fourr T-T I tried yw

Step-by-step explanation:

5 0
3 years ago
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