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3 years ago

Numbers one to ten are written on identical slips of paper. All of the slips of paper are placed in a bag.

Mathematics

1 answer:

MakcuM [25]3 years ago

3 0

Answer: 1/5

Step-by-step explanation: There ar e two multiples of four between 1-10 that means there is a 2/10 chance to pull a multiple of four. Reduced that will give you your answer if they want it reduced.

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What is the fraction of 12 feet of rope cut into 1/3 pieces?

Fiesta28 [93]

Answer:

1/4 hopefully this helps you with work

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3 years ago

You are to take a multiple-choice exam consisting of 64 questions with 5 possible responses to each question. Suppose that you h

damaskus [11]

Answer:

a) Expected score on the exam is 12.8.

b) Variance 10.24, Standard deviation 3.2

Step-by-step explanation:

For each question, there are only two possible outcomes. Either you guesses the answer correctly, or you does not. The probability of guessing the answer of a question correctly is independent of other questions. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected value of the binomial distribution is:

$E(X) = np$

The variance of the binomial distribution is:

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

The standard deviation of the binomial distribution is:

$\sqrt{V(X)} = \sqrt{np(1-p)}$

64 questions.

So $n = 64$

5 possible answers, one correctly, chosen at random:

So $p = \frac{1}{5} = 0.2$

(a) What is your expected score on the exam?

$E(X) = np = 64*0.2 = 12.8$

(b) Compute the variance and standard deviation of x. Variance =Standard deviation

$V(X) = np(1-p) = 64*0.2*0.8 = 10.24$

Variance 10.24

$\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{64*0.2*0.8} = 3.2$

Standard deviation 3.2

5 0

3 years ago

Express 125% as a decimal

timurjin [86]

Answer:

1.25

Step-by-step explanation:

Move the decimal place two spaces left to go from a percentage to a decimal. 125.0% becomes 1.25.

3 0

4 years ago

Read 2 more answers

Which of the following statements about the function cannot be used to conclude that is defined at x = 1?

Murljashka [212]

A Lin x —>1 f(x) exists

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3 years ago

The amount of snow on the ground increased by 4 inches between 4 p.m and 6 p.m. If there was 6 inches of snow on the ground at 4

Vera_Pavlovna [14]

10 inches because at 4 pm it was 6 inches but since it says it increases 4 inches during the times 4 PM through 6 PM it should've gone up another 4 inches. 6 plus 4 equals 10. ?????????

6 0

4 years ago