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Papessa [141]
3 years ago
7

The answer please...!!!

Mathematics
1 answer:
tatiyna3 years ago
5 0

Answer:

Answer is B.

Step-by-step explanation:

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3. In a certain school, there are 456 girls. Calculate the total number of students
marin [14]

Answer:

3) girls = 24% = 456

let the total number of students be = x

\frac{24}{100}  \times x = 456

x = 456 \times  \frac{100}{4}

x = 1900

the total number of students is 1900

4) increase = 20%

new salary = 24000 rupees

let his original salary be = y

\frac{20}{100}  \times y = 24000 - y

0.2y = 24000 - y

0.2y + y = 24000

1.2y = 24000

y =  \frac{24000}{1.2}

y = 20000

his original salary is 20,000 rupees

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3 years ago
You are analyzing survey results regarding whether or not people like low-cal buter or regular butter. 47 said they preferred lo
Black_prince [1.1K]

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47:59

Step-by-step explanation:

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2 years ago
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3 years ago
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A paint manufacturer discovers that the mean volume of paint in a gallon-sized pail is 1 gallon with a standard deviation of 0.0
Agata [3.3K]

Answer:

Approximately 68%.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 1, standard deviation = 0.05.

Estimate the percent of pails with volumes between 0.95 gallons and 1.05 gallons.

0.95 = 1 - 0.05

1.05 = 1 + 0.05

So within 1 standard deviation of the mean, which by the Empirical Rule, is approximately 68% of values.

5 0
3 years ago
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