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
Nimfa-mama [501]
3 years ago
15

Help please...........

Mathematics
1 answer:
Oksana_A [137]3 years ago
6 0
Im not positive but I think the answer is a.
You might be interested in
A survey is being conducted in a county where 62% of the voters are Democrats and 38% are Republican. (a) What is the probabilit
Inessa05 [86]

Answer:

0.3844 = 38.44% probability that two independently surveyed voters would both be Democrats

Step-by-step explanation:

For each voter, there are only two possible outcomes. Either the voter is a Democrat, or he is not. The probability of the voter being a Democrat is independent of other voters. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

62% of the voters are Democrats

This means that p = 0.62

(a) What is the probability that two independently surveyed voters would both be Democrats?

This is P(X = 2) when n = 2. So

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 2) = C_{2,2}.(0.62)^{2}.(0.38)^{0} = 0.3844

0.3844 = 38.44% probability that two independently surveyed voters would both be Democrats

3 0
3 years ago
How long is the shortest route from Allenville to Greenwood?
likoan [24]

Answer:

I think it is 28.

Step-by-step explanation:

Because if you add Allenville and Ashlards it distance to Ashlards to Greenwoods it equals 28.

19.4 + 8.6 = 28

HOPE THIS HELPS!

7 0
3 years ago
Solve the system.
gtnhenbr [62]
X = y + 11

2x + y = -2
2(y + 11) + y = -2
2y + 22 + y = -2
3y + 22 = -2
3y = -24
y = -8

x = y + 11
x = -8 + 11
x = 3

Solution set {3, -8} (C)
8 0
3 years ago
Find the area of each figure
Anon25 [30]
Area of trapezoid = a + b/2 * h
a = 20, b = 9, h = 21/-16
20+9/2 * (21-16) = 29/2 * 5 = 72.5
The area of the trapezoid = 72.5 in^2

Area of the rectangle = l * w
l = 16, w = 20
16 * 20 = 320
The area of the rectangle: 320 in^2
7 0
3 years ago
PLEASE HELP
VashaNatasha [74]

Answer:

8

Step-by-step explanation:

To one decimal place:

2 \sqrt{10}  = 6.3

10 \sqrt{2}  = 14.1

So there are eight integers between 2√10 and 10√2: 7, 8, 9, 10, 11, 12, 13, and 14.

3 0
1 year ago
Read 2 more answers
Other questions:
  • Solve for system of equations y=3x+49, y=7x+13
    12·2 answers
  • Solve 82×41 , show ur work !
    10·1 answer
  • Draw a factor tree the prime factorization of 45 and 90 in the space provided below
    15·1 answer
  • Plz help me answer this question
    9·1 answer
  • Han is cycling at a speed of -8 miles per hour; if he starts at the same zero point, what will his position be after the 45 minu
    15·1 answer
  • How do you solve the equation 3w-(-4)=8-w
    9·1 answer
  • State whether each of the following changes would make a confidence interval wider or narrower.​ (Assume that nothing else​ chan
    8·1 answer
  • selena has developed A function that models the amount of time it will take to feel like concert hall as a function of the numbe
    8·1 answer
  • Find (8.4×108) ÷ (1.2×103). Express your answer in scientific notation.
    9·2 answers
  • QUESTION
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!