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zloy xaker [14]

3 years ago

12

Jill simplified the expression shown.

1 answer:

myrzilka [38]3 years ago

6 0

Hope it helped!! :))

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Which inequality can this number line represent?<br>

mr Goodwill [35]

It represents the answer A.

5 0

3 years ago

Read 2 more answers

I NEED THIS NOW..

amm1812

24 bought 75, which, when multiplied out, equals 1800. 30 bought 60, which, when multiplied out, equals 1800.

1800+1800=3600.

3600*1/3=1200.

1200 cookies were returned.

5 0

4 years ago

A test has 20 true/false questions. What is the probability that a student passes the test if they guess the answers? Passing me

Minchanka [31]

Using the binomial distribution, it is found that:

The probability that the student will get 15 correct questions in this test by guessing is 0.0207 = 2.07%.

For each question, there are only two possible outcomes, either the guess is correct, or it is not. The guess on a question is independent of any other question, hence, the binomial distribution is used to solve this question.

Binomial probability distribution

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$C_{n,x} = \frac{n!}{x!(n-x)!}$

The parameters are:

x is the number of successes.

n is the number of trials.

p is the probability of a success on a single trial.

In this problem:

There are 20 questions, hence $n = 20$ .

Each question has 2 options, one of which is correct, hence $p = \frac{1}{2} = 0.5$

The probability is:

$P(X \geq 15) = P(X = 15) + P(X = 16) + P(X = 17) + P(X = 18) + P(X = 19) + P(X = 20)$

In which:

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 15) = C_{20,15}.(0.5)^{15}.(0.5)^{5} = 0.0148$

$P(X = 16) = C_{20,16}.(0.5)^{16}.(0.5)^{4} = 0.0046$

$P(X = 17) = C_{20,17}.(0.5)^{17}.(0.5)^{3} = 0.0011$

$P(X = 18) = C_{20,18}.(0.5)^{18}.(0.5)^{2} = 0.0002$

$P(X = 16) = C_{20,19}.(0.5)^{19}.(0.5)^{1} = 0$

$P(X = 17) = C_{20,20}.(0.5)^{20}.(0.5)^{0} = 0$

Then:

$P(X \geq 15) = P(X = 15) + P(X = 16) + P(X = 17) + P(X = 18) + P(X = 19) + P(X = 20) = 0.0148 + 0.0046 + 0.0011 + 0.0002 + 0 + 0 = 0.0207$

The probability that the student will get 15 correct questions in this test by guessing is 0.0207 = 2.07%.

You can learn more about the binomial distribution at brainly.com/question/24863377

6 0

3 years ago

Please only right answer I'm so confused.

igor_vitrenko [27]

Rotate the one on the left to look like the one on the right.

BC = SP

AB = SR

AD = RQ

CD = PQ

A = R

B = S

C = P

D = Q

6 0

3 years ago

What Is The Mean Price Per Gallon Of Whole Milk , To The Nearest Cent , On January 1 For The 7 Years Listed In The Table???

Solnce55 [7]

Answer:C 3.51 You add all the totals and divide by 7

Step-by-step explanation:

8 0

3 years ago