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
Katyanochek1 [597]
3 years ago
12

The table shows the probability distribution of siblings of students in a high

Mathematics
2 answers:
sammy [17]3 years ago
7 0

Answer:

The expected number of siblings is 1.05 or 1 (when rounded)

Step-by-step explanation:

Given the probability distribution of siblings of students in a high school with 1500 students:

\begin{array}{ccccccc}\text{Number of Siblings}&0&1&2&3&4&5\\ \\\text{Probabilities}&0.19&0.67&0.08&0.03&0.02&0.01\end{array}

To find the expected value for the number of siblings of a randomly chosen student, myltiply the number of siblings by its probability and add all these products:

0\cdot 0.19+1\cdot 0.67+2\cdot 0.08+3\cdot 0.03+4\cdot 0.02+5\cdot 0.01\\ \\=0.67+0.16+0.09+0.08+0.05\\ \\=1.05

Thus, the expected number of siblings is 1.05 or 1 (when rounded)

Ostrovityanka [42]3 years ago
5 0

Answer: it’s 1.05 :)

Step-by-step explanation:

You might be interested in
Help plz...................................
N76 [4]

Answer:

12

Step-by-step explanation:

These are similar triangles, so the ratio of their sides is the same for each side.

AB = 8  and  BD = 10

So, the ratio is 8:10   or   4:5

Because the triangles are similar....

The ratio of AC:CE  is also  4:5

12:15 = 4:5

So, 12 is the answer!

8 0
3 years ago
In the inequality 1/ 2 x - 6 > 10, x represents Todd's age. Which phrase most accurately describes Todd's age? A) Todd is old
Tom [10]

Answer:

Option A) Todd is older than 32

Step-by-step explanation:

we have

\frac{1}{2}x-6>10

Solve for x

Adds 6 both sides

\frac{1}{2}x>10+6\\\\\frac{1}{2}x>16

Multiply by 2 both sides

x>32

so

Todd's age is greater than 32

therefore

Todd is older than 32

8 0
3 years ago
how much wrapping paper would you need to cover a rectangular that is 18.25 inches by 12inches by 3 inches if you need 10% more
natita [175]

Answer: 681 square inch

Step-by-step explanation:

Hi, we have to apply the formula for the surface area:

A = 2wl + 2lh + 2hw

Where:

w: width

l: length

h: height

Replacing with the values given:

A = (2x12x18.25) + (2x12x3)+(2x18.25x3)

A= 438+72+109.25

A=619.5 in2

Since it has to be 10% more than the surface.

619.5 x (10/100) = 61.95 in2

Adding that value to the surface area

619.5+61.95 = 681.45in2 = 681 in2

4 0
3 years ago
How is domain of the function f(x)=sinx restricted so that its inverse function exists?
Virty [35]

Answer:

Correct answer:  sin x ⇒D(x) :  [- π/2, π/2] ; sin⁻¹x ⇒ CD(x) :  [- π/2, π/2]

Step-by-step explanation:

In order for the function sin x to have an inverse function sin⁻¹x due to the monotony, the domain is taken D(x) :  [- π/2, π/2] and the range of sin⁻¹x  is CD(x) :  [- π/2, π/2].

God is with you!!!

8 0
4 years ago
BÀI 5
lawyer [7]

Answer:

ano hindi po ma hintindihan po hindi paano po yan masasagutan

7 0
3 years ago
Other questions:
  • Currently the Lowest tax bracket in the United States is ?<br> A.0%<br> B.1%<br> C.10%<br> D.15%
    7·2 answers
  • Plz help for last 2?
    11·1 answer
  • LoneWolves or anyone plz help me with this math question! I promise I'll mark u brainliest for the absolute right ANSWER
    5·2 answers
  • Marcia began finding the volume of the box. Her work is shown below.
    14·2 answers
  • 2 lines intersect. Where the 2 lines intersect, 4 angles are created. Labeled clockwise, from uppercase right: angle 1 (3 x minu
    13·1 answer
  • The prices of karaoke at 6 different stores are $77, $85, $78, $72, $80 and $118. What is the outlier in tbe data set?
    6·1 answer
  • Pls help, will give brainlist if u give me the answer!!
    13·1 answer
  • In Hooke's law, Fspring=kΔx, what does the ∆x stand for?
    10·1 answer
  • The sum of Eric’s and Bob’s weights is 9 times the difference of their weights. The positive difference of their weights is also
    15·1 answer
  • It's consumer math. I need help asap. #1
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!