There are 20 pens in a package. ten of the pens are black, 8 are blue, and the rest are red. which ratio represents the number of red pens to black pens?

 The ratio represents the number of red pens to black pens = 1:5.

Step-by-step explanation:

Given : Total pens in package = 20

Number of black pens = 10

Number of blue pens = 8

Number of red pens =   (Total pens in package) - (Number of black pens ) -(Number of blue pens )

= 20-10-8

=2

Now , the ratio represents the number of red pens to black pens =

Number of red pens : Number of black pens

=2 : 10

= 1 :5  [Dividing both sides by 2]

Thus , the ratio represents the number of red pens to black pens = 1:5.

man its nopq i just guessed and got it right so uhh

g00d lucc

step-by-step explanation:

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;