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3 years ago

Hii pls help i’ll give brainliest if you give a correct answer

Mathematics

2 answers:

allochka39001 [22]3 years ago

5 0

Answer:

Step-by-step explanation:

The Moon actually takes 27.3 days to complete one orbit around Earth

anzhelika [568]3 years ago

3 0

Answer: D

Step-by-step explanation:

Most likely D because the more needs to rotate and the axis is north which the moon spins

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an entertainment firm offers several DJ choices and light show that range in price based on the rental time period. the DJ's cos

Mnenie [13.5K]

Answer:

219 + 159 <= x <= 369 + 309

378 <= x <= 678

Step-by-step explanation:

4 0

2 years ago

HELP! WILL MARK BRAINLIEST!

posledela

Answer: C

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

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

2 years ago

PLEASE HELP I DON’T UNDERSTAND GIVE EXPLANATION PLEASE In a recent year, 22.3% of all registered doctors were female. If there w

bija089 [108]

Answer:

247,085 doctors in total

Step-by-step explanation:

55,100 = 22.3℅ ÷22.3

2,471 = 1℅

2471.85x100 = 247,085 doctors

To check I'll do 247,085÷100 = 2,470.85 = 1℅

2,470.85 × 22.3 = 55,099.955 which would round up to 51,000.

7 0

3 years ago

Solve for variable. 3p/5 + 8/5 =1

nordsb [41]

$\\ \sf\longmapsto \dfrac{3p}{5}+\dfrac{8}{5}=1$

$\\ \sf\longmapsto \dfrac{3p+8}{5}=1$

$\\ \sf\longmapsto 3p+8=5$

$\\ \sf\longmapsto 3p=5-8$

$\\ \sf\longmapsto 3p=-3$

$\\ \sf\longmapsto p=\dfrac{-3}{3}$

$\\ \sf\longmapsto p=-1$

5 0

2 years ago