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
Harrizon [31]
2 years ago
15

The probability all of the students in this class will be present and on time is 3/10. The probability all of the students are p

resent is 2/5. What is the probability that everyone is on time given that everyone is present? Give your answer as a simplified fraction.​
Mathematics
1 answer:
cestrela7 [59]2 years ago
7 0

Answer:

3/4

Step-by-step explanation:

A: students present
B: students on time

P(all students present and on time) = P(A and B) = 3/10
P(all students present) = P(A) = 2/5

P(A and B) = P(A).P(B|A) where P(B|A) is the probability of everyone being on time given that everyone is present

So P(B|A) = P(A and B) /P(A) = 3/10 ÷ 2/5 = 3/10 * 5/2 = 15/20 which can be reduced to 3/4 by dividing numerator and denominator by 5

You might be interested in
2. What is the quotient of 6 and -1/2?<br> O -12<br> O -1/12
Kamila [148]

Answer:

- 12

hope this helps you!

6 0
3 years ago
Two blocks of wood are shaped as right rectangular prisms. The smaller block has a length of 9 cm, a width of 3 cm, and a height
solmaris [256]
1512 I believe! :) I would double all the dimensions first, then multiply them all together. 
3 0
3 years ago
Read 2 more answers
Is the 161 rounded to the nearest 10 or to the nearest 100
kaheart [24]

Answer:

10

Step-by-step explanation:

so you can make it 200

5 0
3 years ago
Amanda is the owner of a small chain of dental offices. She sent out the yearly satisfaction survey to 600 randomly selected pat
Morgarella [4.7K]

Answer:

Null Hypothesis: The proportion of clients satisfied at the uptown office is 76%.

Alternative Hypothesis: There is no difference in the satisfaction between the uptown and the downtown clients.

Null Hypothesis: The proportion of clients satisfied at the downtown office is greater than the proportion of clients satisfied at the uptown office.

Alternative Hypothesis: Downtown clients are less satisfied with the dental office staff than uptown clients.

Null Hypothesis: The proportion of clients satisfied at the downtown office is 84%.

Alternative Hypothesis: Uptown clients are more satisfied with the dental office staff than downtown clients.

Null Hypothesis: The proportion of clients satisfied at the downtown office is equal to the proportion of clients satisfied at the uptown office.  

Alternative Hypothesis: There is a difference in the satisfaction between the uptown and the downtown clients.

Step-by-step explanation:

pls mark as brainliest

8 0
3 years ago
Five males with an​ X-linked genetic disorder have one child each. The random variable x is the number of children among the fiv
Nesterboy [21]

Answer:

a) It is probability distribution

b) mean = 2.5

c) Standard Deviation = 1.11

Step-by-step explanation:

We are given the following in the question:

x          0           1           2         3          4          5

P(x)  0.033   0.149   0.318   0.318   0.149   0.033

Probability distribution:

\displaystyle\sum P_i(x_i) = 0.033+ 0.149 +0.318+ 0.318+ 0.149 +0.033 = 1

Since, the summation of all the probabilities is 1 and each value of probability is between 0 and 1, the given is a probability distribution.

Mean of probability distribution:

E(x) = \displaystyle\sumx_iP(x_i)\\E(x) = 0(0.033)+ 1(0.149)+2(0.318)+3(0.318) +4(0.149) + 5(0.033)\\E(x) = 2.5

Thus, the mean of distribution is 2.5

Standard deviation of probability distribution:

E(x^2) = 0^2(0.033)+ 1^2(0.149)+2^2(0.318)+3^2(0.318) +4^2(0.149) + 5^2(0.033)\\E(x^2) = 7.492\\\sigma^2 = E(x^2) - (E(x))^2\\\sigma^2 = 7.492 - (2.5)^2 = 1.242\\\sigma= \sqrt{1.242} = 1.11

Thus, the standard deviation of the probability distribution is 1.11

5 0
4 years ago
Other questions:
  • Check out the photo for the question
    14·2 answers
  • Look at the photo to understand more
    13·1 answer
  • The vertices of a triangle are P(2,-4), Q(-5,3), and R(-1,-2). What are the vertices of the image reflected across the y-axis?
    14·2 answers
  • For two-week. John and Amanda had the following transaction occurred to their checking account a deposit of 1644 and 50 Cent Sha
    9·1 answer
  • Please help! due in less than 10 mins. please !! thank you so much<br> What is y?
    15·1 answer
  • Y= 2x<br> x+y=12<br> What is this answer? How do you solve it?
    6·2 answers
  • A merchant bought 30 dozen pairs of gloves. How many individual gloves did the merchant buy? A-720 B-420 C-300
    13·1 answer
  • What does the expression x ≤ 4 mean in word form?
    10·2 answers
  • I accidentally clicked on a answer, but i need help again.. :D<br>​
    7·1 answer
  • Kim caught a fish that was 9/10 of a meter long. Doug caught a fish that was 2/3 as long as kim's fish
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!