3 years ago

Deandra traded $2800 for Swiss francs, immediately changed her mind, and

Mathematics

1 answer:

inessss [21]3 years ago

6 0

Answer:

Step-by-step explanation:

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3. From the table below, find Prof. Xin expected value of lateness. (5 points) Lateness P(Lateness) On Time 4/5 1 Hour Late 1/10

wariber [46]

Answer:

The expected value of lateness $\frac{7}{20}$ hours.

Step-by-step explanation:

The probability distribution of lateness is as follows:

Lateness P (Lateness)

On Time 4/5

1 Hour Late 1/10

2 Hours Late 1/20

3 Hours Late 1/20

The formula of expected value of a random variable is:

$E(X)=\sum x\cdot P(X=x)$

Compute the expected value of lateness as follows:

$E(X)=\sum x\cdot P(X=x)$

$=(0\times \frac{4}{5})+(1\times \frac{1}{10})+(2\times \frac{1}{20})+(3\times \frac{1}{20})\\\\=0+\frac{1}{10}+\frac{1}{10}+\frac{3}{20}\\\\=\frac{2+2+3}{20}\\\\=\frac{7}{20}$

Thus, the expected value of lateness $\frac{7}{20}$ hours.

8 0

3 years ago

Can someone explain how to do that, please?

Leviafan [203]

43% = 43/100= 0.43 THATS HOW U DO IT

5 0

4 years ago

Read 2 more answers

Find the area of the parallelogram.

Nadya [2.5K]

It’s d cuz it has 14 of them

6 0

4 years ago

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Solve for r. r+2<10 FIRST TO SOLVE WILL BE BRAINLIEST

Marat540 [252]

Answer:

The answer is:

r<8

Alternative Form of the answer:

r ∈ (-∞, 8)

4 0

3 years ago

3(2x+14)divided by w-y if w=8,x=5,y=1 how do i solve this

Viktor [21]

$\frac{3 (2x + 14)}{w - y}$
$w = 8, x = 5, y = 1$

You have to first substitute every variable into its spot in the equation.

 $\frac{3 (2x + 14)}{w-y}$
 $\frac{3 (2*5 + 14)}{8 - 1}$

Then solve.

$\frac{3 (28)}{7} = \frac{84}{7} = 12$

3 0

3 years ago