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jeka57 [31]
3 years ago
6

I need help on this,can anyone help me?

Mathematics
1 answer:
svlad2 [7]3 years ago
8 0

Answer:

no nobody can help you

Step-by-step explanation:

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Find the expected value for the random variable. | 9 12 15 18 21 P(z) 0.16 0.25 0.36 0.17 0.06 Z E(z) = (Type an integer or a de
dmitriy555 [2]

Answer:

The expected value for the random variable is 14.16.

Step-by-step explanation:

We are given the following data below;

          Z                               P(Z)                        Z \times P(Z)

          9                               0.16                           1.44

         12                              0.25                             3

         15                              0.36                           5.4

         18                               0.17                           3.06

         21                          <u>    0.06    </u>                 <u>      1.26      </u>  

       Total                       <u>       1        </u>                <u>      14.16      </u>  

Now, the expected value for the random variable Z is given by;

          E(Z) = \sum Z \times P(Z)

                  = (9 \times 0.16) + (12 \times 0.25) +......+(21 \times 0.06)

                  = 14.16.

5 0
4 years ago
How many solutions does the following absolute value equation have? |x+3|=4
bekas [8.4K]
It has two solutions.
The first solution is x = -7
The second solution is x = 1

Hope this helps!
3 0
4 years ago
The diameter of a circle is 7 centimeters. What is the circle's circumference in terms of ?​
elena-14-01-66 [18.8K]

Answer:

diameter = 11

Step-by-step explanation:

πd /2

22/7 ×7

22 /2

8 0
3 years ago
I will write to explain how to determine the constant rate of change from a graph.
Setler [38]

Answer:

Good for you?

Step-by-step explanation:

4 0
3 years ago
PLEASE HELP FOR BOTH 5 and 6
vekshin1

5- How do you go to school everyday? Or who picks you up from home to school,
6- Students.
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