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
olga2289 [7]
2 years ago
8

What is the probability of getting exactly 5 “heads” in 10 coin flips ?

Mathematics
2 answers:
castortr0y [4]2 years ago
6 0

There are \dbinom{10}5=\dfrac{10!}{5!(10-5)!}=252 ways of getting exactly 5 heads in 10 tosses. There are 2^{10}=1024 possible outcomes. So the probability of getting exactly 5 heads is

\dfrac{252}{1024}=\dfrac{63}{256}\approx24.61\%

VladimirAG [237]2 years ago
4 0

Answer:

the answer is 63/256 or b

Step-by-step explanation:

You might be interested in
Help me please I dont get it
aev [14]

Answer:

x>10

Step-by-step explanation:

I hope it helps. Please let me know.

4 0
2 years ago
Read 2 more answers
Please help me with this
Ne4ueva [31]

Answer:

Option c

Step-by-step explanation:

A system of equations are given to us. And we need to solve them . The given system is

\begin{cases} y = 2x - 3\dots 1 \\ y = x^2 - 3\dots 2 \end{cases}

We numbered the equations here . Now put the value of equation 1 in equation 2 that is substituting y = 2x - 3 in eq. 2 .

\implies y = x^2 - 3 \\\\\implies 2x - 3 = x^2 - 3 \\\\\implies x^2 - 2x = 0 \\\\\implies x(x-2) = 0 \\\\\implies\red{ x = 0 , 2 }

We got two values of x as 0 & 2 . Alternatively substituting these values we have ,

\implies y = 2 x - 3 \\\\\implies y = 2(0)-3 \qquad or \qquad y = 2(2)-3 \\\\\implies y = 0-3 \qquad or \qquad 4 - 3 \\\\\implies \red{ y = -3 , 1 }

Thefore the required answer is ,

\red{Option\:c} \begin{cases} (0,-3) \\ (2,1) \end{cases}

4 0
2 years ago
Read 2 more answers
Solve the equations <br> 3x + 5y = 21 <br> -20x + 5y <br> show your work
Digiron [165]

Answer:

x=21/23

Step-by-step explanation:

Solve for x:

3x+5y=21−20x+5y

Add 20x to both sides:

3x+5y+20x=−20x+5y+21+20x

23x+5y=5y+21

Subtract 5y to both sides:

23x+5y+−5y=5y+21+−5y

23x=21

Divide both sides by 23:

x=21/23

8 0
3 years ago
If there were 80 points scored overall, how many of them were scored by Bridgette? she scored 5% of the points
Simora [160]

Answer: she scored 4 points

Step-by-step explanation: 5% of 80=4

;-----------;

6 0
3 years ago
Read 2 more answers
(2) 345
inessss [21]

Answer:

275 miles in 5 hours

55 miles in one hour

Check

to check if im right

275×2 would be how many miles she drove in 10 hours rght ? 275×2=550

550 miles in 10 hours

we know one hour is 55 miles & 5 hours is 275 & 10 hours is 550

10 hours plus 3 hours = 13 hours right ?

55 ×3 = 165

550 +165=715

715 miles in 13 hours

Step-by-step explanation:

715÷13 to get how many miles she drove in one hour .

=55 miles in 1 hour .

then multiply 55 ×5 to get how many miles she drove in 5 hours

55×5=275

275 miles in 5 hours

5 0
2 years ago
Other questions:
  • Find the relationship between the number of movie tickets sold and number of available seats
    5·1 answer
  • Tables seating 4 people we're available for outside eating if 21 tables were filled how many people ate outside
    14·1 answer
  • walt averages 98 miles per hourin 4 races. if each race is 95 miles in lenght, how many miles did walt drive in the race?
    10·2 answers
  • The percentage change of a ratio of two variables is approximately the percentage change in the numerator _____ the percentage c
    14·2 answers
  • Three vertices of a rectangle have coordinates (3,4), (5,-4), and (-7,-7). What is the y coordinate of the fourth vertex?
    10·1 answer
  • A professor gives a statistics exam. The exam has 100 possible points. The scores for the students in the second classroom are a
    6·1 answer
  • HELPPPP PLEASEEE ITS NUMBER 6
    10·1 answer
  • people ask me sometimes why can’t you do your homework and I say it’s because I help people with theres and they never help me :
    8·2 answers
  • LOOK AT THE PICTURE PLEASE HELP A GIRL OUT IM STUCK ON THIS QUESTION AND I DONT HAVE A LOT OF TIME!!
    15·2 answers
  • What is 30/72 in simplest form?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!