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Olenka [21]
4 years ago
12

Suppose that 1010​% of a certain batch of calculators have a defective​ case, and that 1414​% have defective batteries.​ Also, 5

5​% have both a defective case and defective batteries. A calculator is selected from the batch at random. Find the probability that the calculator has a good case and good batteries.
Mathematics
1 answer:
S_A_V [24]4 years ago
6 0

Answer: Our required probability is 81%.

Step-by-step explanation:

Since we have given that

Probability of defective calculators (C)= 10%

Probability of defective batteries (B) = 14%

Probability of both defective calculators and defective batteries = 5%

So, it becomes.

P(C\cup B)=P(C)+P(B)-P(B\cap C)\\\\P(C\cup B)=10+14-5\\\\P(C\cup B)=19\%

So, probability that the calculator has a good case and good batteries is given by

100\%-19\%=81\%

Hence, our required probability is 81%.

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Please help? 20 points!!!!!!!!!!!!!!!!!!
Vinvika [58]

Answer:

Year 12

They will be 62 inches

Brainliest plz took me so loong

Step-by-step explanation:

Year 1: Eva 40, Naomi 29

Year 2: Eva 42, Naomi 32

Year 3: Eva 44, Naomi 35

Year 4: Eva 46, Naomi 38

Year 5: Eva 48, Naomi 41

Year 6: Eva 50, Naomi 44

Year 7: Eva 52, Naomi 47

Year 8: Eva 54, Naomi 50

Year 9: Eva 56, Naomi 53

Year 10: Eva 58, Naomi 56

Year 11: Eva 60, Naomi 59

Year 12: Eva 62, Naomi 62

Equation:

12 years so

Eva's equation: 12x2=24 24+38=62

Naomi's equation:12x3=36 36+26=62

4 0
3 years ago
Simplify the expression the root of negative one all over the quantity of four minus three i minus the quantity of two plus five
svlad2 [7]
We will break this down into its parts:
We know that this is a fraction where the numerator is √(-1) = i
The denominator:
4 - 3i - (2 + 5i); we put 2 + 5i in brackets because we are to subtract its quantity.
Simplifying the denominator:
4 - 3i - 2 - 5i
= 2 - 8i
Now, we write the expression in fractional form:
i / (2 - 8i)
To remove an imaginary number from the denominator, we multiply and divide by its conjugate. The conjugate of a + bi is a - bi
i(2 + 8i) / (2² - (8i)²)
= (-8 + 2i) / (4 + 64)
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4 0
4 years ago
The constraints of a problem are listed below. What are the vertices of the feasible region?<br>​
Mamont248 [21]

Answer:

Option 4 : (0.\frac{3}{2} ) \ , \ (0,2) \ , \ (6,0) \ , \ (\frac{9}{4} ,0)

Step-by-step explanation:

<u>See the attached figure:</u>

To find the vertices of the feasible region, we need to graph the constraints, then find the area included by them, then calculate the vertices which is the intersection between each two of them.

As shown, the shaded area represents the solution of the constraints

So, the vertices of the feasible region are:

(0.\frac{3}{2} ) \ , \ (0,2) \ , \ (6,0) \ , \ (\frac{9}{4} ,0)

8 0
3 years ago
Read 2 more answers
I want to know the answer to the sum of f and 6
11111nata11111 [884]

f + 6 = ?

Well, the answer can be pretty much any number. It all depends on what number f is. f is a variable, so you can plug in any number to replace f.

For example, if f was 5, this is what the equation would look like:

5 + 6 = 11

If f was -3, this is what the equation would look like:

-3 + 6 = 3

So, again, the answer can be anything. It depends on what f is.

4 0
3 years ago
Plz help i don't understand ​
Vika [28.1K]

Answer:

Mistake was at Step 5

Step-by-step explanation:

Going from Step 4 to Step 5 you're supposed to:

Division first: 2 + (10 / 2)

Then Addition:  2 + 5

Solution = 7

Step 5 did addition first then division when it is supposed to do division first, then addition

6 0
3 years ago
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