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
STatiana [176]
3 years ago
10

If you flip a coin 44 times what is the best prediction possible for the number of times it’ll land on heads

Mathematics
1 answer:
nika2105 [10]3 years ago
8 0

Answer:

12% chance of 22

35% chance of 21, 22, or 23

55% chance of 20, 21, 22, 23, or 24


How can 22 be a good prediction when it's wrong 88% of the time?


I'd say from 20 to 24 is a good prediction without being trivial.


Step-by-step explanation:

C(n,k) = n Choose k = n! / (k! (n-k)!)

aka binomial coefficient

aka from n things choose k


To get probability of getting heads 22 times in 44 tries, you divide number of ways to get heads 22 times by number of ways to assign heads or tails to each throw.


Two ways to assign H or T to first, times two ways for second throw,

gives 2^44. That's the denominator.


Number of ways to get heads 22 times is the same as number of ways to choose which 22 flips of 44 are to be heads, or C(44,22)


To get 12% calculate C(44,22)/2^44

To get 55% calculate C(44,20)/2^44 + ... + C(44,24)/2^44


You might be interested in
Pls help I’m failing math I’ll brainlest ASAP
skad [1K]

The equation <u>6 + 9a = 51</u> can help find out how many adults were in the group.

5 0
3 years ago
Pls help It’s due tomorrow question is in the picture
Slav-nsk [51]

Answer:

C

Step-by-step explanation:

Let's find the area of each of the two circles.

First Circle:

The first circle has a diameter of 10 inches. That means the radius is 5 inches. So, its area is:

A=\pi r^2\\A=\pi (5)^2\\A=25\pi

Second Circle:

The second circle has a diameter twice that of the first. So, the diameter is 20 inches. This means that the radius is 10 inches. Find the area:

A=\pi r^2\\A=\pi (10)^2\\A=100\pi

Now, find the ratio between them by dividing:

\frac{\text{Smaller}}{\text{Larger}}=\frac{25\pi}{100\pi}

Simplify:

\frac{\text{Smaller}}{\text{Larger}}=\frac{1}{4}

1/4 is the same as 1:4

So, our answer is C      :)

5 0
3 years ago
In a recent survey, three out of every five teenagers said they listen to music while studying.
Virty [35]

Answer:

225

Step-by-step explanation:

3 out of 5 is .6 is u multiply .6 by 375 you get 225

7 0
3 years ago
Factor completely, the expression: 2x^3-2x^2-12x
muminat
2x^3-2x^2-12x=2x(x^2-x-6)=(*)\\\\------------------------------\\x^2-x-6\\\\a=1;\ b=-1;\ c=-6\\\\\Delta=(-1)^2-4\cdot1\cdot(-6)=1+24=25\\\\\sqrt\Delta=\sqrt{25}=5\\\\x_1=\frac{1-5}{2\cdot1}=\frac{-4}{2}=-2;\ x_2=\frac{1+5}{2\cdot1}=\frac{6}{2}=3\\\\x^2-x-6=(x+2)(x-3)\\\\------------------------------\\\\(*)=2x(x+2)(x-3)
8 0
3 years ago
2.Pleas can someone answer!
kenny6666 [7]

Answer: A, A, C

Step-by-step explanation:

Educated Guess because none of them are going to be zero so it's either A or C but the point has a negative y so to plug it all in all of them have to be negative ex. -1 + -1 + -1 =-3

the x is -1 so both have to be negative in order to get -3

5 0
3 years ago
Other questions:
  • Does this table represent a function? Why or why not?
    7·2 answers
  • What is the approximate area of the shaded sector in the circle shown below?
    11·2 answers
  • 8/12 in simplest form
    14·2 answers
  • The time it takes a brick layer to lay bricks varies directly with the number of bricks. The brick layer's data is shown in the
    12·2 answers
  • 3. Riley records the number of
    14·2 answers
  • Please help im really not good at these things ;( brainliest will be given
    5·1 answer
  • 34+987=what please help
    5·2 answers
  • What type of number is 50?
    8·1 answer
  • I NEED THIS DONE ASAPPPP<br> expand 4(m+2)<br><br> 4(m+2) =
    14·1 answer
  • Solve: 0 <img src="https://tex.z-dn.net/?f=%5Cleq" id="TexFormula1" title="\leq" alt="\leq" align="absmiddle" class="latex-formu
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!