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
Drupady [299]
2 years ago
14

Please help I have no clue what I’m doing and I have a quiz tmr

Mathematics
2 answers:
charle [14.2K]2 years ago
7 0

Answer:

(Incorrect)

Step-by-step explanation:

With possibility problems, the fraction is Desired Outcome/All Possible Outcomes. We want heads twice, so our desired outcome is 2. If you flip a coin once, you can land on two sides. So, if you flip twice, you can land on two sides twice (4). The fraction is 2/4. We can simplify this to 1/2.

Korolek [52]2 years ago
6 0

Answer:

11/16

Step-by-step explanation:

"at least 2 times" means 2 or 3 or all 4 times.

which is the opposite (1 - ...) of getting it 0 or 1 time.

the probabilty of getting heads in one attempt is 1/2.

as is the probability to get tails. no other result is possible.

the probability to get 2 heads (or 2 tails) is

1/2 × 1/2 = 1/4

the probability to get 4 heads or 4 tails is

1/2 × 1/2 × 1/2 × 1/2 = 1/16

so, the probability to get at least 2 heads in 4 attempts is the same as

1 - the probability to get 4 tails (0 heads) - the probability to get exacting 1 heads =

= 1 - 1/16 - the probability to get exactly 1 heads

the probability to get exactly 1 heads (and therefore 3 tails) is in one possible combination of coin results

1/2 × 1/2×1/2×1/2 = 1/16 (it is funny with coins and only 2 possible results).

but how often can we pick 1 out of 4 (how many combinations of C(4, 1) are possible) ? 4.

so, we need to multiply 1/16 by 4 = 4/16 to get that overall probability.

so, now again, the probability to get at least 2 heads in 4 attempts is

1 - 1/16 - 4/16 = 1 - 5/16 = 16/16 - 5/16 = 11/16

You might be interested in
HELPP IM FAILING MATH RN!! <br><br> LC is 40°. What is the measure of arc CB?
wel

Hi there!

\large\boxed{100^{o}}

∠C = 40° and triangle ABC is isosceles, therefore:

∠C = ∠A = 40°

Angles in a triangle sum up to 180°, so:

180 = 40 + 40 + ∠A

180 = 80 + ∠A

100 = ∠A

Thus, arc CB has a measure of 100°.

6 0
3 years ago
Read 2 more answers
Jackson sells top-of-the-line programmable sewing machines for Singer sewing machine company for every sewing machine he sells h
Dafna11 [192]
A: $135
B: He will have to sell 10,500 sewing machines.
6 0
3 years ago
HELP!!!
Savatey [412]

Hello!

To find the circumference of a circle, use the formula: C = 2πr. Since the radius is given, we can substitute that into the formula.

C = 2(36)π

C = 72π

Therefore, the circumference of the circle is 72π inches.

8 0
3 years ago
You are buying 30 acres of farm land at $12,000 per acre. What is the total cost?
aalyn [17]

Answer: 360,000 dollars becuz u have to multiply them together

BRAINIEST?



8 0
3 years ago
Read 2 more answers
Determine the midpoint between the two points x(4,-6) and y(-2,8)
ikadub [295]

Answer:

p(a, b) = (1, 1)

Step-by-step explanation:

Midpoint formula is

p(a, b)=(\frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2} ) ---------------(1)

Here

(x_1, y_1) = (4, -6) \ \ \ and \ \ \ (x_2, y_2) = (-2, 8)

Substituting values in equation (1)

p(a, b)=(\frac{4 - 2}{2}, \frac{-6 + 8}{2} )

p(a, b) = (1, 1)

6 0
3 years ago
Other questions:
  • 1.) List all prime numbers less than 10.
    14·1 answer
  • Madison has 6 rolls of coins . each roll has 20 coins . how many coins does madison have
    11·2 answers
  • an item is regularly priced at $30. it is on sale for 30% off the regular price. what is the sale price?
    10·1 answer
  • Use multiplication to prove that AB ≠ BA. Show all work for full credit.
    8·1 answer
  • What is the value of t? 3/5t - 4 - 7/10t = -2<br><br><br> A. -20<br> B. -5<br> C. 5<br> D. 20
    15·1 answer
  • The square root of 110 is between which two integers
    6·1 answer
  • the cost of 6 sandwiches and 4 drinks is $53. the cost of 4 sandwiches and 6 drinks is #47. how much does one sandwich cost?
    14·1 answer
  • Which equation is the inverse of y= 9^2 - 4?
    5·2 answers
  • Help please! I know this is easy but I don’t know what to do!
    15·1 answer
  • 13-6=3x-14 whats the value of x
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!