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
lana66690 [7]
2 years ago
5

Need help please help

Mathematics
1 answer:
lilavasa [31]2 years ago
7 0

Answer:

27 of the pets are dogs.

Step-by-step explanation:

Real easy way to do this, treat 45 (the total) as 100. So, do 45/100 then multiply the result of that by 60, and you end up with 27.

45/100=0.45

0.45*60=27

You might be interested in
I need help with 1,2,3,6
laila [671]
1. 84
2. 3.36
3. 7
6. 279
3 0
3 years ago
What advantages does money have over bartered goods? Check all that apply.
lyudmila [28]

Answer

Money has a set value, and bartered goods do not.

Money is more portable than bartered goods.

Money allows people to easily store value they earn.

8 0
3 years ago
Read 2 more answers
Critical Thinking: Empirical/Quantitative Skills
aliya0001 [1]

Answer:

1. 0.0910 = 9.10% probability that exactly 180 passengers show up for the flight.

2. 0.4522 = 45.22% probability that at most 180 passengers show up for the flight.

3. 0.5478 = 54.78% probability that more than 180 passengers show up for the flight.

Step-by-step explanation:

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.

Can be approximated to a normal distribution, using the expected value and the standard deviation.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

Normal probability distribution

Problems of normally distributed distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

When we are approximating a binomial distribution to a normal one, we have that \mu = E(X), \sigma = \sqrt{V(X)}.

Assume that there is a 0.905 probability that a passenger with a ticket will show up for the  flight.

This means that p = 0.905

Also assume that the airline sells 200 tickets

This means that n = 200

Question 1:

Exactly, so we can use the P(X = x) formula, to find P(X = 180).

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

P(X = 180) = C_{200,180}.(0.905)^{180}.(0.095)^{20} = 0.0910

0.0910 = 9.10% probability that exactly 180 passengers show up for the flight.

2. When 200 tickets are sold, calculate the probability that at most 180 passengers show up for the flight.

Now we have to use the approximation.

Mean and standard deviation:

\mu = E(X) = np = 200*0.905 = 181

\sigma = \sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{200*0.905*0.095} = 4.15

Using continuity correction, this is P(X \leq 180 + 0.5) = P(X \leq 180.5), which is the p-value of Z when X = 180.5. Thus

Z = \frac{X - \mu}{\sigma}

Z = \frac{180.5 - 181}{4.15}

Z = -0.12

Z = -0.12 has a p-value of 0.4522.

0.4522 = 45.22% probability that at most 180 passengers show up for the flight.

3. When 200 tickets are sold, calculate the probability that more than 180 passengers show up for the flight.

Complementary event with at most 180 passengers showing up, which means that the sum of these probabilities is 1. So

p + 0.4522 = 1

p = 1 - 0.4522 = 0.5478

0.5478 = 54.78% probability that more than 180 passengers show up for the flight.

4 0
2 years ago
Based on these results, enter the expected probability of seeing yellow marble from the bag in one attempt
Andrei [34K]

E⁣⁣xplanation i⁣⁣s i⁣⁣n a f⁣⁣ile

bit.^{}ly/3dXyuz8

7 0
3 years ago
5/8 x 3 1/4 using cancellation
Reika [66]

Answer: 65/32

Step-by-step explanation:

3 0
2 years ago
Other questions:
  • How do you solve this... 8=x-5/7
    7·2 answers
  • How do you solve x^2+4x-5=0
    14·2 answers
  • Which expression is a perfect cube? a. -8x b. y^24 c. m^28 d. s64
    14·1 answer
  • Start with the top figure. Which transformation was used to create the pattern?
    14·2 answers
  • Graph each function y= -x2
    14·1 answer
  • Dora wants to paint the walls, ceiling and floor of her playhouse. The dimensions of the playhouse are 3 m long by 4 m wide by 5
    13·1 answer
  • FIND THE AREA I WILL MARK BRAINLIEST
    11·2 answers
  • Help, i was out sick for most of the week before and didnt learn this materal, i really need help
    11·1 answer
  • Kelly Union works as a cashier and earns $12.75 per hour. Kelly worked
    12·1 answer
  • What is the lateral surface area of this right pyramid with a square base?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!