MATHEMATICS MIDDLE SCHOOL

Anyone.... Are being from California and preferring brand B independent events? Why or why not?

Answers

Answer 1

Answer:

Yes, they are independent because P(Texas) ≈ 0.45 and P(Texas/brand A) ≈ 0.45.

What are independent events?

The literal meaning of Independent Events is the events which occur freely of each other.

A taste test asks people from Texas and California which pasta they prefer, brand A or brand B.

A person is randomly selected from those tested.

And we have find that are being from Texas and preferring brand A independent events or not.

Firstly, we know that these two events will be independent when;

$\rm P(Texas) = P(Texas/brand A)\n\n P(Texas) = (Number \ of \ people \ for \ texas)/(Total \ number \ of \ people \ taxes)\n\n P(Texas) = (125)/(275)\n\n P(Texas) = 0.45$

$\rm And \ P(Texas/brand A) = (P(Taxes \cap Brand \ A )/(P (Brand \ A))\n\n P(Texas/brand A) = (80)/(176)\n\n P(Texas/brand A) = 0.45$

Hence, being from Texas and preferring brand A are independent events because P(Texas) ≈ 0.45 and P(Texas/brand A) ≈ 0.45.

Learn more about independent events here;

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Answer 2

Answer:

Answer:

I am not 100% sure, but just thinking about it logically, they should not be independent events, and I believe it is A.

Step-by-step explanation:

The reason I believe they are not independent events is because people in California may be used to eating a certain flavor pallet in their area, whereas Texas may have different general flavors in their area. Now as far as the numbers, I am not entirely sure, I am assuming you know since your question was just asking if they were independent or not. However, if it is percent, it does seem like A makes the most sense in relation to the totals. Also you can use deductive reasoning. Most often when there are answer choices, there is one correct answer choice, and the others have all the same aspects, but only 1 thing is changed. Since this is generally the case, you can take similarities between answer choices as parts that are correct, and the little variances which are only in one answer as modifications from the correct answer. For instance in this question, there is 1 that says yes, and 2 that say no. Because of this, I assume that it must be no since yes must be that one modification that makes that answer choice incorrect. Now its A or B. I look at all the answer choices and see that B is the only one that says California brand B is .36 whereas the other two say .55. From this I assume that .36 is the variance that makes it incorrect, leaving me with A as my answer.

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Tickets to the museum cost $18 for adults and $12 for children. A group of 20 people went to the museum, and the tickets cost $324. The system of equations models this situation, where x is the number of adults and y is the number of children.x-y=20
18x+12y=324

How many adults and how many children were in the group?

A.
8 adults and 12 children

B.
10 adults and 10 children

C.
12 adults and 8 children

D.
14 adults and 6 children

Answers

As far as i can see, there is something wrong with one of the equationsthat are given in the question. It is mentioned in the question that atotal of 20 people went to the museum. That means that among those 20people there were children as well as adults. So the equation that ismentioned in the question given below is wrong.
x - y = 20
The correct equation would be x + y = 20
The second equation given in the question is absolutely correct.
18x + 12y = 324
Diving both sides by 6 we get
3x + 2y = 54
Now let us get back to the first equation
x + y = 20
x = 20 - y
Putting the value of x in the second equation we get
3x + 2y = 54
3(20 - y) + 2y = 54
60 - 3y + 2y = 54
60 - y = 54
-y = 54 - 60
-y = -6
y = 6
Then we get that the number of children going to the museum is 6
So
The number of adults = 20 - 6
= 14
So the total number of adults going to the museum is 14 and the number of children going to the museum is 6. The correct option in the question is option "D".

What does it mean for a product of factors to be expressed using exponents

Answers

example:

7x7x7x7x7x7x7x7x7x7x7x7=84
there are 12 sevens
u put the deleted number as the big number (7) and the number of repeated numbers as the smaller sized number which is called the exponent (12)

Jill got an 85% on a math test if there were 40 questions in total,how many did she get wrong?

Answers

You can solve this by setting up a proportion. You can put the number of items correct over the total number. and substitute the unknown number with x.

$(85)/(100)$ = $(x)/(40)$ Cross-multiply
3400 = 100x Divide both sides by 100
34 = x

40 - 34 = 6

So, Jill got 6 questions wrong.

yeah she got 6 questions wrong

Can some one help me please

Answers

x-intercept is (4,0)
y-intercept is (0,4)

Five girls share 4 sandwiches equally. What fraction of a sandwich does each girl get?

Answers

so 4 divided into 5 parts
this is represented as 4 out of 5 or 4/5 in fraciton form

Solve:-

5 Girls share 4 sandwiches

4/5

Means 4 sandwhices shared by 5 girls.

Roger wants to have 400 copies of his resume printed. His local print shop charges $21.50 for the first 200 copies and $10 for every 100 additional copies. How much will the 400 copies cost, including a sales tax of 6%? Type numerical answer only.