All categories

2 years ago

Help me please!!!!!!?!!!

Mathematics

1 answer:

Tatiana [17]2 years ago

6 0

25 because 54-29=25

5 because 30/6=5

10 because 45-35=10

21 because 7x3=21

You might be interested in

The number of hours between successive train arrivals at the station is uniformly distributed on (0, 1). Passengers arrive accor

Zepler [3.9K]

Answer:

The value of $E(X) =\frac{7}{2}$ .

The value of $Var (X)= \frac{91}{12}$ .

Step-by-step explanation:

Consider the provided information.

The number of hours between successive train arrivals at the station is uniformly distributed on (0, 1). Passengers arrive according to a Poisson process with rate 7 per hour.

Let X denote the number of people who get on the next train.

Part (A)

Here, X = N(T), N(t) ∼ Poisson(λt), and λ = 7

Therefore, E(N(T)|T) = λT

Now find E(X) as shown below

$E(X) = E(N(T))$

$E(X) = E(E(N(T)|T))$

$E(X) = E(\lambda T) = \frac{7}{2}$

Hence, the value of $E(X) =\frac{7}{2}$ .

Part (B)

Now we need to find VAR[X]

$Var (X) = Var (E(N(T)|T)) +E(Var (X|T))$

$Var (X)= E(\lambda T)+Var (\lambda T)$

$Var (X)= \frac{49}{12}+\frac{7}{2}$

$Var (X)= \frac{91}{12}$

Hence, the value of $Var (X)= \frac{91}{12}$

7 0

3 years ago

You spin a three section spinner three times and record the results what type of event is this. Dependent or Independent?

raketka [301]

Answer:

Independent event

Step-by-step explanation:

Since the second and third spins do not depend on the results of the previous spins, this is an independent event.

7 0

3 years ago

Read 2 more answers

I WILL MARK AS BRAINLIEST

wariber [46]

Answer:

B. 62.93 cm²

Step-by-step explanation:

Formula to find area of triangle : $\frac{1}{2}$ * b * h

$\frac{1}{2}$ * 20.3 * 6.2

62.93 cm²

6 0

2 years ago

Read 2 more answers

Y½ × 4y¼<br><br>I want help!!

irina1246 [14]

Answer: 5 1/4

Step-by-step explanation:

8 0

3 years ago

Joe and Antonio need to read a book for their English class. Joe is 5/8 of the way through the book, and Antonio has read 7/12 o

frosja888 [35]

Answer:

joe

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers