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Radda [10]
3 years ago
11

On an exam, the average score is 76 with a standard deviation of 6 points What is the probability that an individual chosen at r

andom will have a score below 67 on this exam
Mathematics
1 answer:
AysviL [449]3 years ago
4 0

Answer:

P [ X < 67 ] =  0,66,81      or    66,81 %

Step-by-step explanation:

We assume Normal Distribution  N ( μ ; σ )    N ( 76 ; 6 )

z score for 67 is :

z(s) =  (  X - μ  ) /σ

z(s) =  (  67 - 76 ) / 6

z(s) =  - 9 / 6

z(s) = - 1,5

with 1,5 we fnd n z-table area undr the curve  α = 0,6681

Then  P [ X < 67 ] =  0,66,81      or    66,81 %

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How do I solve this
MatroZZZ [7]

Answer:

36

Step-by-step explanation:

First do -1 - 5, which is -6.

then square -6.

so 6 x 6 equals 36.

4 0
2 years ago
there are 5 walnut trees currently in the park park workers will plant 8 more walnut trees today how many walnut trees will the
Salsk061 [2.6K]

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Step-by-step explanation:

8 0
3 years ago
Joseph has a job walking dogs and gets paid per dog. He needs to walk 45 dogs to earn enough money to pay for his soccer team fe
rusak2 [61]

Using proportions, it is found that it will take him 22.5 hours to walk the 45 dogs.

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

A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct or inverse proportional, can be built to find the desired measures in the problem.

He walks 3 dogs in 1 hour and 30 minutes, we means that the time in hours it takes for him to walk a dog is:

t = 1.5/3 = 0.5 hours.

Hence the time it will take him to walk 45 dogs is given by:

45 x 0.5 = 22.5 hours.

More can be learned about proportions at brainly.com/question/24372153

#SPJ1

8 0
1 year ago
Find the equation of a line that is perpendicular to x+y=8 and passes through the point (8, 10).
ArbitrLikvidat [17]

Answer:

Y = -x + 2

Step-by-step explanation:

y = -x + 8

y = 1x + b

10 = 8 + b

b = 2

6 0
3 years ago
Read 2 more answers
a line with the slope of -2 passes through the point (1,7) what is the closest point on the line above (1,7) which has a whole n
deff fn [24]
The closest point above on this line is (0,9)

You can find this by using the rise over run method. Since the slope is -2, we can move to the next whole number point by observing the fraction 2/-1.

Rise = 2
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If you start on the point (1,7) and rise two, it will bring you to (1,9), then you have to move back one space (or run) to (0,9).
3 0
3 years ago
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