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2 years ago

84 students are in the school choir. The ratio of girls to boys is 3:4. How many members are girls?

Mathematics

2 answers:

Paul [167]2 years ago

7 0

3 + 4 = 7
84 ÷ 7 = 12 = 1 (in terms of the ratio)
12 × 3 = 36, which is the answer
Hope this helps :)

azamat2 years ago

7 0

There is 36 girls and 48 boys

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3 years ago

The temperature of coffee served at a restaurant is normally distributed with an average temperature of 160 degrees Fahrenheit a

posledela

Answer:

The 20th percentile of coffee temperature is 155.4532 degrees Fahrenheit.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 160 degrees

Standard Deviation, σ = 5.4 degrees

We are given that the distribution of temperature of coffee is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

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Thus,

$P_{20}=155.4532$

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2 years ago

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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