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2 years ago

SOLVE THIS PROBLEM ASAP PLS

Mathematics

1 answer:

zzz [600]2 years ago

6 0

Answer:

a) 6 girls

b) 3 more boys than girls

c) Pizza

Step-by-step explanation:

You know that half of 4 is 2, and 4+2=6.

There is 1 full circle and 1 circle that is 3/4.

3/4 of 4 is 3.

4+3 is 7 for the girls.

For the boys, there is 2 full circles and 1 half circle.

Half of 4 is 2.

8+2=10.

10-7=3.

You can clearly see its pizza!!!

Hope this helps! <3

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The simplified ratio would be 8 to 5.

Step-by-step explanation:

We can get the simplified ratio by finding the largest number that both sides can be divided by. In this context, it is the number 3 so we divide both sides by 3 to simplify the ratio.

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3 years ago

A particular sale involves four items randomly selected from a large lot that is known to contain 9% defectives. Let X denote th

umka2103 [35]

Answer:

The expected repair cost is $3.73.

Step-by-step explanation:

The random variable X is defined as the number of defectives among the 4 items sold.

The probability of a large lot of items containing defectives is, p = 0.09.

An item is defective irrespective of the others.

The random variable X follows a Binomial distribution with parameters n = 9 and p = 0.09.

The repair cost of the item is given by:

$C=3X^{2}+X+2$

Compute the expected cost of repair as follows:

$E(C)=E(3X^{2}+X+2)$

$=3E(X^{2})+E(X)+2$

Compute the expected value of X as follows:

$E(X)=np$

$=4\times 0.09\\=0.36$

The expected value of X is 0.36.

Compute the variance of X as follows:

$V(X)=np(1-p)$

$=4\times 0.09\times 0.91\\=0.3276\\$

The variance of X is 0.3276.

The variance can also be computed using the formula:

$V(X)=E(Y^{2})-(E(Y))^{2}$

Then the formula of $E(Y^{2})$ is:

$E(Y^{2})=V(X)+(E(Y))^{2}$

Compute the value of $E(Y^{2})$ as follows:

$E(Y^{2})=V(X)+(E(Y))^{2}$

$=0.3276+(0.36)^{2}\\=0.4572$

The expected repair cost is:

$E(C)=3E(X^{2})+E(X)+2$

$=(3\times 0.4572)+0.36+2\\=3.7316\\\approx 3.73$

Thus, the expected repair cost is $3.73.

4 0

2 years ago