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4 years ago

What is 2/5 of 20???

Mathematics

2 answers:

Nina [5.8K]4 years ago

5 0

$\frac{2}{5}\ of\ 20\Rightarrow\frac{2}{5}\times20=\frac{2}{5}\times\frac{20}{1}=\frac{40}{5}=8$

Shtirlitz [24]4 years ago

3 0

2/5 of 20 = 20/5 * 2 = 4 * 2 = 8

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What are all the choices

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4 years ago

The probability distribution function for the discrete random variable where x is equal to the number of red lights drivers typi

Ivahew [28]

Using probability concepts, it is found that:

a) The missing value is 0.04.

b) The mean is of 0.37.

The distribution is given by:

$P(X = 0) = 0.76$

$P(X = 1) = 0.15$

$P(X = 2) = 0.05$

$P(X = 3) = x$

Item a:

The sum of <u>all the probabilities has to be 1</u>, that is:

$\sum_{i = 0}^{3} P(X = i) = 1$

Thus:

$0.76 + 0.15 + 0.05 + x = 1$

$0.96 + x = 1$

$x = 0.04$

The missing value is 0.04.

Item b:

The mean is given by the <u>sum of each outcome multiplied by it's probability</u>, thus:

$E(X) = 0(0.76) + 1(0.15) + 2(0.05) + 3(0.04) = 0.37$

The mean is of 0.37.

A similar problem is given at brainly.com/question/20709747

7 0

3 years ago

Steve is driving from Las Vegas, Nevada to San Diego, California. The drive is 331 miles, how fast will he have to drive to get

Marrrta [24]

Divide 331 by 4.5
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3 years ago

Read 2 more answers

Liam is going to a carnival that has games and rides. Each game costs $5 and each ride costs $3.50. How much would Liam have to

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Answer:

$43

Step-by-step explanation:

You have to find how much he is paying for his games and how much he is paying for his rides, then add them together.

5(3) = $15 (games)

8(3.5) = $28 (rides)

28+15 = 43

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3 years ago

Alexis scale drawing represents the longest side of the storage bin as 2 3/4 inches. What is the actual length, in feet, of the

Whitepunk [10]

Answer: The correct answer is C,

5 1/2 feet

Step-by-step explanation:

Alexis' scale drawing represents the longest side of the storage bin as 2 3/4 inches. Converting to improper fraction, it becomes 11/4 inches. This is also 2.75 inches.

The scale used is 1/2 inch = 1 feet. This means that a length of 1 feet of the longest side of the actual storage bin is 1/2 inch on the drawing.

Let the actual length, in feet of the longest side of the storage bin be x feet. Therefore

If 0.5 inch = 1 feet

2.75 inch = x

0.5x = 2.75 × 1

x = 2.75/0.5 = 5.5 feet

6 0

4 years ago