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Shtirlitz [24]
3 years ago
12

In Tim’s coffee shop a study was done to see how many people buy coffee and donut of 160 people came in one day 60 bought coffee

and a doughnut the rest bought coffee or a donut find the experimental probability that the next person will by both the coffee and donut a
Mathematics
2 answers:
olchik [2.2K]3 years ago
3 0

Answer:

3/8 or 37.5

Step-by-step explanation:

60/160 simplified

Elza [17]3 years ago
3 0

Answer:

3/8

Step-by-step explanation:

60/160 is simplified

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Can someone explain to me how to do this and help me?​
riadik2000 [5.3K]

put the percentage on the right and label it "% of parents who use it "

and at the bottom of the graph, put " types of parental control"

count the percentages by five's starting from 25

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8 0
3 years ago
Sarah took the advertising deparſment from her company on a round trip to meet with a potential client. Including Sarah a total
wlad13 [49]

Answer:

Sarah bought 7 coach tickets and 4 first class tickets.

Step-by-step explanation:

From the information provided, you can write the following equations:

x+y=11 (1)

240x+1100y=6080 (2), where:

x is the number of coach tickets

y is the number of first class tickets

In order to find the value of x and y, first you have to solve for x in (1):

x=11-y (3)

Now, you have to replace (3) in (2) and solve for y:

240(11-y)+1100y=6080

2640-240y+1100y=6080

860y=6080-2640

860y=3440

y=3440/860

y=4

Finally, you can replace the value of y in (3) to find the value of x:

x=11-y

x=11-4

x=7

According to this, the answer is that Sarah bought 7 coach tickets and 4 first class tickets.

7 0
3 years ago
Assume the population has a normal distribution. A sample of 25 randomly selected students Has a mean test score of 81.5 With a
Natasha_Volkova [10]

Answer:

The 90% confidence interval for the mean test score is between 77.29 and 85.71.

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 25 - 1 = 24

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 24 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 2.064

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2.064\frac{10.2}{\sqrt{25}} = 4.21

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 81.5 - 4.21 = 77.29

The upper end of the interval is the sample mean added to M. So it is 81.5 + 4.21 = 85.71.

The 90% confidence interval for the mean test score is between 77.29 and 85.71.

6 0
3 years ago
Who ever answers this first gets brainly
Alex777 [14]

Answer: A

im sure

Step-by-step explanation:

7 0
3 years ago
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5) Beth is making brownies. She makes 5 batches of brownies on Saturda She uses 1/4 cup of butter in each batch. How much butter
Irina-Kira [14]

Answer:

the answer is 5/4. If you multiply 1/4 by 5 you get 1 1/4 which is the same as 5/4.

8 0
2 years ago
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