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
Deffense [45]
3 years ago
7

A coin is tossed four times What is the probability of getting four heads? (1 mark) a) b) What is the probability of getting exa

ctly work. (2 marks) two heads? Be sure to show your What is the probability of not getting two heads? Be sure to show your work.
Mathematics
1 answer:
BlackZzzverrR [31]3 years ago
6 0
<h2>Answer:</h2>

1. A coin is tossed four times. What is the probability of getting four heads?

Each toss has a 1/2 chance of getting a head.

So the chance of getting all four heads can be calculated as :

1/2\times1/2\times1/2\times1/2=1/16

2. A coin is tossed four times. What is the probability of getting two heads?

Each toss can have 2 results, so 4 flips will have 2^{4} or 16 results.

Getting two heads means getting two tails also. So, we can get the number of times two heads come = \frac{4!}{2!2!} = 6

We can write the groups like - {HHTT,HTHT,HTTH,THHT,THTH,TTHH}

So, the required probability is : 6/16 or 3/8.

3. Not getting two heads means getting 3 tails and 1 head or all tails.

Probability of having all tails = 1/2\times1/2\times1/2\times1/2=1/16

Probability of one head(1st trial) and three tails = 1/16

Probability of one head (2nd trial) and three tails (the 1st, 3rd and 4th trials) = 1/16

Probability of one head (3rd trial) and three tails (the 1st, 2nd and 4th trials) = 1/16

Probability of one head (4th trial) and three tails (the 1st, 2nd and 3rd trials) = 1/16

So, the total probability showing only one or none head and at least three tails = 1/16+1/16+1/16+1/16+1/16=5/16

You might be interested in
Adam has game and education apps on his tablet. He noticed that he has 4 game apps for every 3 education apps. Which of the foll
Elena L [17]

sorry need the pointsbsnsnamakKklMMmMmm

3 0
3 years ago
Which of the expressions below has a 4 in the ones place of the sum? Select all that apply.
lara [203]

Answer:

its C or D

Step-by-step explanation:

i think it's both !

8 0
3 years ago
Read 2 more answers
1/2x+3=2x is...<br> a)x=6<br> b)x=4<br> c)x=2<br> d)x=1
Oduvanchick [21]
The answer is C.2 I’m pretty sure
3 0
3 years ago
Read 2 more answers
What is mMHJ? Please help
Ghella [55]
2x - 20 = x + 15

x = 35

Now plug x in:

2*35 - 20 = 50 degrees






7 0
3 years ago
Write the following phrase as an algebraic expression.<br><br>A number divided by 14​
Vikentia [17]

Answer:

x÷14

Step-by-step explanation:

easy dude easy this needs to be 20 characters long

3 0
3 years ago
Read 2 more answers
Other questions:
  • What percent is equal to 4.25?<br><br> Enter your answer in the box.
    5·2 answers
  • 5/4x + 2/x +3<br> algebra 2
    6·1 answer
  • Find the roots of 6x^2+480=0
    12·1 answer
  • One factor of One factor of f(x)=5x^3+5x^2-170x + 280 is (x +
    11·2 answers
  • a recipe for sparkling grape juice calls for 1 1/2 quarts of sparkling water and 3/4 quarts for grape juice, how much of each in
    8·1 answer
  • HELP WILL GIVE BRAINIEST ANSWER!!!!!!!Which triangle is congruent to △GHI by the AAS theorem?
    12·2 answers
  • PLEASE HELP!!! URGENT!!!​
    10·2 answers
  • Which of the following does NOT represent a function?
    13·2 answers
  • The veterinarlan told Sally that her cat needs to lose 5 pounds. A healthy weight loss for her cat would be about 1 pound every
    10·2 answers
  • B. Solve for the product of the following fractions. Express your answer in simples form.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!