1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Fudgin [204]
3 years ago
13

(a) Fill in the tavle below to complete the proability distrubution of X

Mathematics
1 answer:
Aliun [14]3 years ago
6 0

Answer:

2.6

Step-by-step explanation:

Given :

x 1 2 3 4

P(x) 0.3 0.2 ? 0.4

Σp(x) = 1

Hence, 0.3 + 0.2 +? + 0.4 = 1

0.9 +? = 1

? = 1 - 0.9

? = 0.1

For the mean :

E(X) = ΣX*P(X)

(1 * 0.3) + (2 * 0.2) + (3 *0.1) + (4* 0.4)

0.3 + 0.4 + 0.3 + 1.6 = 2.6

Hence, the mean = 2.6

You might be interested in
A pendulum is 45 cm long. When it swings, it travels along the arc of a circle and covers a distance of 27.5 cm. Calculate the a
11Alexandr11 [23.1K]

Answer: The angle through which the pendulum travels = 35^{\circ}.

Step-by-step explanation:

Formula: Length of arc: l= r\theta , where r= radius ( in radians) , \theta = central angle.

Given: Length of pendulum (radius) = 45 cm

Length of arc= 27.5 cm

Put these values in the formula, we get

27.5=45\theta\\\\\Rightarrow\theta=\dfrac{27.5}{45}=\dfrac{275}{450}\\\\\Rightarrow\ \theta=\dfrac{11}{18}\text{ radians}

In degrees ,

\theta=\dfrac{11}{18}\times\dfrac{180}{\pi}=\dfrac{110\times7}{22} \ \ \ \    [\pi=\dfrac{22}{7}]

\theta=35^{\circ}

Hence, the angle through which the pendulum travels = 35^{\circ}.

4 0
3 years ago
The value -1 is a solution for x^2 - 6x + 5 = 0 True or False?
solmaris [256]
False -1 is not a solution.
3 0
3 years ago
What kind of financial institutions does the Office of Thrift Supervision oversee?
xxTIMURxx [149]
Savings and Loan Institutions.
5 0
3 years ago
All the select drop box is. are not and are
Brilliant_brown [7]

Answer:

Step-by-step explanation:

Corresponding angles of both the squares are congruent. (angles of a square measure 90°)

Ratio of the sides of the given squares = \frac{\text{Side length of small square}}{\text{Side length of the large square}}

                                                                 = \frac{2}{5}

This ratio of side lengths is constant for all corresponding sides.

Therefore, corresponding sides are proportional.

Since, all angles of both the squares are congruent and all the sides are proportional, both the squares will be similar.

Scale factor = \frac{\text{Side length of large square}}{\text{Side length of the smaller square}}

                    = \frac{5}{2}

                    = 2.5

This sequence of similarity transformations shows the figures are similar.

8 0
3 years ago
I am not sure of the answers​
astra-53 [7]

Answer: 2 3/4 as an improper fraction would be B. 11/4

7 0
3 years ago
Read 2 more answers
Other questions:
  • How many variable terms are in the expression 3x^y + 5x^ - 4y + z + 9?
    13·1 answer
  • Josh Wilson is traveling to California from South Carolina for summer vacation. The states are approximately 2500 miles apart dr
    13·2 answers
  • Solve and show your work.<br> 26 = 3x - 2 - 7x
    5·1 answer
  • One end of a ramp is raised to the back of a truck 1 meter
    9·1 answer
  • Hexagon ABCDEF is a regular hexagon. Show that segments AE and ED are perpendicular.
    12·1 answer
  • If m=10 simplify the follwing M+6
    8·2 answers
  • Seriously can any1 help me
    6·1 answer
  • Solve for X: -5x - 7&lt;28
    8·2 answers
  • What is 1x1+2+6x7+9<br> A. 54<br> B. 67<br> C. 12<br> D. 8
    9·2 answers
  • To solve the equation ‐2x + 5 = 9 for x, what operations must be performed on both sides of the equation in order to isolate the
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!