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inn [45]
3 years ago
5

I really need help!

Mathematics
1 answer:
aleksklad [387]3 years ago
8 0

Answer:

3/20

Step-by-step explanation:

Total number of students = 15 + 10 = 25

Number of girls = 10

Number of ways to select 2 students =

Number of ways to select 2 girls =

Compute the probability of selecting two girls as follows:

Thus, the probability that both students are girls is 0.15.

0.15 simplified in fraction from: 3/20

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If Sam is 3 years younger that Marco.Marco is 15 years old.How old is Sam
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Answer:

Sam is 12 years then

Step-by-step explanation:

Sam's age =15-3

=12 years

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3 years ago
Which formula is used to calculate the standard deviation of sample data?<br>​
Reptile [31]

Answer:

Standard deviation (S) = square root of the variance

Standard deviation is the measure of spread most commonly used in statistical practice when the mean is used to calculate central tendency. Thus, it measures spread around the mean

Step-by-step explanation:

8 0
3 years ago
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An employee named Bolarry in a restaurant makes $22.50 an hour. He gets a 12.5% raise (Markup). What does this man make for a we
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Answer:

$911.25

Step-by-step explanation:

For 1 day the man works for 6 hours.

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New Value/Old Value = 100 + rate/100

New Value/$810 = 112.5/100

By solving this equation, we get $911.25. So the man will earn $911.25 if he works for 6days a week.

5 0
3 years ago
Conor runs at a constant rate, it takes 34 minutes to run 4 miles . Write the linear equation in two variables that represents t
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Answer:

4x+y=34

Step-by-step explanation:

Linear equations can be written in 3 forms:

slope-intercept form

standard form

point-slope form

standard form's formula is ax+by=c,

now sub in 34 for c and 4 for a

4x+by=34

we can put in 1 for b since there is no other integers

4x+y=34

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3 years ago
Pretend that it’s 7:00 now. In 33 hours, what time will the clock show? Don’t worry about AM/PM
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4:00

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If this helps please mark me brainliest.

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3 years ago
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