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2 years ago

Generate two equivalent fractions for each fraction. Use fraction tikes or number lines. 1/3

Mathematics

1 answer:

Romashka [77]2 years ago

4 0

Equivealent= like

6/18, 5/15
3/9, 2/6

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Josie wants to make a drawstring backpack for her friends. She has 6 friends and the total for the backpacks is 48 dollars

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8 dollars for each friend

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3 years ago

This years “Dream of a lifetime” lottery sold 50,000 tickets and gave away 5,000 prizes including one grant prize

dem82 [27]

Answer:

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Step-by-step explanation:

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3 years ago

Write the number 6\times 10^{-3}6×10 {−3} in standard form.

solmaris [256]

Answer:

6 · 10⁻³

Step-by-Step Explanation:

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1 year ago

A multiple-choice examination has 20 questions, each with five possible answers, only one of which is correct. Suppose that one

kari74 [83]

Answer:

The probability that the student answers at least seventeen questions correctly is $8.03\times 10^{-10}$ .

Step-by-step explanation:

Let the random variable X represent the number of correctly answered questions.

It is provided all the questions have five options with only one correct option.

Then the probability of selecting the correct option is,

$P(X)=p=\frac{1}{5}=0.20$

There are n = 20 question in the exam.

It is also provided that a student taking the examination answers each of the questions with an independent random guess.

Then the random variable can be modeled by the Binomial distribution with parameters n = 20 and p = 0.20.

The probability mass function of X is:

$P(X=x)={20\choose x}\ 0.20^{x}\ (1-0.20)^{20-x};\ x =0,1,2,3...$

Compute the probability that the student answers at least seventeen questions correctly as follows:

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

$=\sum\limits^{20}_{x=17}{{20\choose x}\ 0.20^{x}\ (1-0.20)^{20-x}}\\\\=0.00000000077+0.000000000032+0.00000000000084+0.000000000000042\\\\=0.000000000802882\\\\=8.03\times10^{-10}$

Thus, the probability that the student answers at least seventeen questions correctly is $8.03\times 10^{-10}$ .

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3 years ago

Which is a statistical question?

attashe74 [19]

I’m pretty sure the answer is D. Sorry if I’m wrong

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2 years ago