All categories

3 years ago

there are 80 student in a class if 6 of them are absent then find the percentage of the present student

Mathematics

2 answers:

mario62 [17]3 years ago

5 0

Answer: 74/80 = 92.5% of the students are present.

VLD [36.1K]3 years ago

4 0

Answer:92.5%

Step-by-step explanation:

Divide 100 by 80 to find the percentage each student counts for

Then multiply the product(1.25) by 74 (the present students) to get the answer

You might be interested in

Please Help!! I will give 50 points and brainliest.. The question is attached below

Daniel [21]

Answer:

okey i will help you what is that

4 0

3 years ago

3x-4y=-14 6x+3y=27 don’t understand how to solve

Katarina [22]

tama Ang kanyang sagot

5 0

3 years ago

How many women must be randomly selected to estimate the mean weight of women in one age group? We want 90% confidence that the

ki77a [65]

Answer:

155 women must be randomly selected.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.9}{2} = 0.05$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.05 = 0.95$ , so Z = 1.645.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

The population standard deviation is known to be 28 lbs.

This means that $\sigma = 28$

We want 90% confidence that the sample mean is within 3.7 lbs of the populations mean. How many women must be sampled?

This is n for which M = 3.7. So

$M = z\frac{\sigma}{\sqrt{n}}$

$3.7 = 1.645\frac{28}{\sqrt{n}}$

$3.7\sqrt{n} = 1.645*28$

$\sqrt{n} = \frac{1.645*28}{3.7}$

$(\sqrt{n})^2 = (\frac{1.645*28}{3.7})^2$

$n = 154.97$

Rounding up:

155 women must be randomly selected.

4 0

3 years ago

The price of milk has increased in year from rs.28 per liter to rs.32 per liter . find the percentage increase in the price....

Mice21 [21]

Answer:

14.28%

Step-by-step explanation:

here's your solution

=> price of milk before = ₹28

=> price of milk after increasing = ₹32

=> increased in price = ₹32 - ₹28 = ₹4

=> now , increased percentage= 4/28*100

=> 14.28%

4 0

3 years ago

Find the slope of a line parallel to the line whose equation is 3Y- 5x =15

Vanyuwa [196]

Answer:

The slope is 5/3

Step-by-step explanation:

3y-5x=15 turned into a slope intercept form is y=5/3x+5.

5/3 is the slope part of this equation.

4 0

2 years ago

there are 80 student in a class if 6 of them are absent then find the percentage of the present student​

there are 80 student in a class if 6 of them are absent then find the percentage of the present student