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
Alexeev081 [22]
3 years ago
15

A coin flipped 10 times and the results is recorded. What is the probability of getting at least 8 tails ?

Mathematics
1 answer:
DochEvi [55]3 years ago
6 0

Answer: 0.0546875

Step-by-step explanation:

The number of times the coin landing head 8 out of 10 is simply:

C(10, 8)/2^10. At least 8 means, 8 or more. Since the events here are dependent on themselves the answer would be:

[ C(10, 8) + C(10, 9) + C(10, 10) ] / 2^10 = 56/1024 = 0.0546875

You might be interested in
2a - 3b = -11<br> a + 3b = 8
dlinn [17]

Answer:

b = 3 and a = -1

Step-by-step explanation:

You have your given equation:

2a - 3b = -11

a + 3b = 8

You need to find what a and b is.

To find b:

2a - 3b = -11

-2a - 6b = -16

I multiplied a + 3b = 8 by -2. When you multiply a number you have to multiply all of them. You have to choose a number that would cancel out all of a.

So now your equation would look like this when you solve for b:

2a - 3b = -11

-2a - 6b = -16

-------------------

a - 9 = -27 then you divide -9 to -27 which is 3 so b = 3.

To find a:

2a - 3b = -11

a + 3b = 8

I multiplied a + 3b = 8 by -1 and 2a - 3b = -11 by -1 as well.

Your equation will look like this when you solve for a:

-2a + 3b = 11

-1a - 3b = -8

------------------

-3a = 3 then divide -3 to 3 which is -1 so a = -1.

Check to see if you have the correct answer by plugging in the number you got for a and b into the equation and solve.

1. 2(-1) -3(3) = -11

 -2 - 9 = -11

2. -1 + 3(3) = 8

   -1 + 9 = 8

8 0
3 years ago
kalen has a 60 gallon fuel tank. the fuel gauge points to 1/4 how mcuh fuel does she need to buy to fill the tank
murzikaleks [220]

Answer:

45 Gallons

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Plz guys help i need asap<br> its part b im stuck
aleksklad [387]

Answer:

a.2nd quarter with 9 goals

b. 4.8 goals

c. 4 goals

Step-by-step explanation:

a. The mode is defined as the most appearing data point or the data point with the highest frequency..

From our data(for away goals):

  • 1st quarter-2
  • 2nd quarter-9
  • 3rd quarter-7
  • 4th quarter-4

Hence, the 2nd quarter has the mode for away goals with 9 goals.

b. Mean is defined as the average of a set of data points.

#We calculate the totals goals per quarter, sum over all quarters then divide by the number of games, 10:

\bar x=\frac{1}{n}\sum{x_i}\\1^{st }_g=Away+Home=5+2=7\\\\2^{nd}_g=Away+Home=4+9=13\\\\3^{rd}_g=Away+Home=8+7=15\\\\4^{th}_g=Away+Home=9+4=13\\\\\bar x=\frac{1}{n}\sum{x_i}=\frac{1}{10}(7+13+15+13)=4.8

Hence, the mean number of goals per quarter is 4.8 goals

c. To find the number of more home goals than away goals, we subtract from their summations as:

g_m=\sum{g_h}-\sum{g_a}\\\\=(5+4+8+9)-(2+9+7+4)\\\\=26-22\\\\=4

Hence, there are 4 more home goals than away goals.

4 0
3 years ago
The average weight of a group of seven boys is 56 kg. The individual weights (in kg) of 6 of them are 52,57,55,60,59 and 55. fin
garik1379 [7]

Answer:

54 kg

Step-by-step explanation:

Total weight of 7 boys is 392 kg. And other 6 boys total weight is 338 kg.

So the 7th boy's weight is (392-338)=54 kg

7 0
3 years ago
Read 2 more answers
This is a few questions that are confusing for me and I only have 22 points but if you help me and actually help instead of stea
neonofarm [45]

Answer:

n<1.3

Step-by-step explanation:

-2.5n+8.7>5.45

add -8.7 on both sides

-2.5n>-3.25

divide both sides by -2.5

n<1.3   (after division inequality sign changes)

answer of Q2 is -4 2/3

answer of Q3 is -2/9

answer of Q4 is -23/3

answer of Q5 is 2^2. 3^2.5

6 0
3 years ago
Other questions:
  • PLS HELP I WILL MARK BRAINLIEST
    10·1 answer
  • Write 7x-2-7x+6 in simplest form.
    10·1 answer
  • Ray cuts out a figure that has 4 equal sides and no right angles. What is the best name for the figure?
    5·3 answers
  • How do you solve the expression for this problem r/.45=19.
    6·1 answer
  • Rounded to the nearest hundredth 0.96
    13·2 answers
  • All I need is the answer I have legit no idea what I'm doing.
    12·1 answer
  • HELP PLEASE! Write a quadratic function that passes through the point (-1,9), has an axis of symmetry of x=-3 and a minimum valu
    7·1 answer
  • Joshua ran 1.45 miles, and Jasmine ran 1.5 miles who Ran Farther?
    7·2 answers
  • Hallar la ecuación de la recta que pasa por el punto (−4; −1) y su raíz es -3
    9·1 answer
  • HELP ASAP <br> I WILL GIVE BRAINIST
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!