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3 years ago

4. The elementary school cafeteria is considering changing the menu

Mathematics

2 answers:

larisa86 [58]3 years ago

6 0

Answer:

Fifty students names are drawn from a hat

Step-by-step explanation:

This way it is impossible to know who's name is being picked from the hat. picking students at random still allows you to have the choose of which students to pick .

allochka39001 [22]3 years ago

6 0

Answer:

Step-by-step explanation:

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The ratio of boys to girls in a school is 5:4. if there are 500 girls , how many boys are there in the school?

lana [24]

Answer:

The number of boys in the school is;

$625$

Explanation:

Given that the ratio of boys to girls in a school is 5:4;

$5\colon4$

And there are 500 girls in the school.

The number of boys in the school will be;

$\begin{gathered} \frac{B}{G}=\frac{5}{4} \\ G=500 \\ B=\frac{5\times G}{4}=\frac{5\times500}{4} \\ B=625 \end{gathered}$

Therefore, the number of boys in the school is;

$625$

3 0

1 year ago

Stock A ‘s returns have a standard deviation of 0.5, and stock B’s returns have standard deviation of 0.6.The correlation coeffi

galben [10]

Answer:

The variance of the profile is 0.2179.

Step-by-step explanation:

We are given the following in the question:

$\sigma_A = 0.5\\\sigma_B = 0.6\\\rho_{A,B} = 0.5\\w_A = 70\% = 0.7\\w_B = 30\% = 0.3$

Variance of portfolio is given by:

$w_A^2\sigma_A^2 +w_B^2\sigma_B^2 + 2w_Aw_BCov_{A,B}$

$Cov_{A,B} = \rho_{A,B} \times \sigma_A \times \sigma_B \\=0.5\times 0.5 \times 0.6\\=0.15$

Putting values, we get,

$w_A^2\sigma_A^2 +w_B^2\sigma_B^2 + 2w_Aw_BCov_{A,B}\\=(0.7)^2(0.5)^2 + (.3)^2(0.6)^2 + 2(0.7)(0.3)(0.15)\\=0.2179$

Thus, the variance of the profile is 0.2179.

4 0

3 years ago

Sally went school shopping she had a budget of 10.00 she bought a pen for 1.75 and a paper for 1.33 her change was 6.08 how much

irakobra [83]

Answer:

$0.84

Step-by-step explanation:

1. find total cost of both the pen and paper

$1.75 + $1.33 = $3.08

2. find the amount Sally spent

$10 - $6.08 = $3.92

3. find cost of ruler

$3.92 - $3.08 = $0.84

4 0

3 years ago

How do you solve and simplify 2/5+1/4+7/10=

Alchen [17]

Hello!

Answer: ⇒ 27/20

Step-by-step explanation:

$\frac{8}{20}+\frac{5}{20}+\frac{14}{20}$

Since the denominators are equal, then combine the fractions.

$\frac{8+5+14}{20}$

Add by the numbers.

$8+5+14=27$

$=\frac{27}{20}$

Hope this helps!

Thank you for posting your question at here on brainly.

Have a great day!

-Charlie

4 0

2 years ago

Read 2 more answers

Can you guys please help me!!

Karo-lina-s [1.5K]

32 it’s as simple as 4(5) + 12

7 0

2 years ago

Read 2 more answers