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Elina [12.6K]
3 years ago
14

Each boy in a class has 7 pockets and each girl in that class has 11 pockets. How many boys and how many girls are there in this

class if there are 147 pockets and 17 heads?
Mathematics
1 answer:
amm18123 years ago
5 0
7 girls, because 11(7)+7(10)+147
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Step-by-step explanation:

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Another one!<br><br> I don´t get how to solve it please explain
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When individuals in a sample of 150 were asked whether or not they supported capital punishment, the following information was o
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Answer:

\chi^2 = \sum_{i=1}^n \frac{(O_i -E_i)^2}{E_i}

The expected values for all the categories is :

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And the best option would be:

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Step-by-step explanation:

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\chi^2 = \sum_{i=1}^n \frac{(O_i -E_i)^2}{E_i}

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E_i =\frac{150}{3}=50

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\chi^2 = \frac{(40-50)^2}{50}+\frac{(60-50)^2}{50}+\frac{(50-50)^2}{50}=4

And the best option would be:

b. 4

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4 years ago
If the length of the minute hand of the clock in London commonly known as “Big Ben” is 11.25’ from the center of the clock to th
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A whole hour or revolution is 60 minutes and 360° so the area of a sector is:

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A=πr^2/12 and r=11.25ft so

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A≈33.13 ft^2
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3 years ago
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