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
sladkih [1.3K]
3 years ago
10

I need help ASAP! Can anyone please check my work?

Mathematics
1 answer:
STALIN [3.7K]3 years ago
8 0

A = event the person got the class they wanted

B = event the person is on the honor roll

P(A) = (number who got the class they wanted)/(number total)

P(A) = 379/500

P(A) = 0.758

There's a 75.8% chance someone will get the class they want

Let's see if being on the honor roll changes the probability we just found

So we want to compute P(A | B). If it is equal to P(A), then being on the honor roll does not change P(A).

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

A and B = someone got the class they want and they're on the honor roll

P(A and B) = 64/500

P(A and B) = 0.128

P(B) = 144/500

P(B) = 0.288

P(A | B) = P(A and B)/P(B)

P(A | B) = 0.128/0.288

P(A | B) = 0.44 approximately

This is what you have shown in your steps. This means if we know the person is on the honor roll, then they have a 44% chance of getting the class they want.

Those on the honor roll are at a disadvantage to getting their requested class. Perhaps the thinking is that the honor roll students can handle harder or less popular teachers.

Regardless of motivations, being on the honor roll changes the probability of getting the class you want. So Alex is correct in thinking the honor roll students have a disadvantage. Everything would be fair if P(A | B) = P(A) showing that events A and B are independent. That is not the case here so the events are linked somehow.

You might be interested in
What's 1.5 :- 56<br><img src="https://tex.z-dn.net/?f=%20%5Cdiv%2052" id="TexFormula1" title=" \div 52" alt=" \div 52" align="ab
Diano4ka-milaya [45]
The answer of the question will be uou
8 0
2 years ago
Read 2 more answers
25 is 45% of what number
Oksi-84 [34.3K]

Answer: 55.56

Step-by-step explanation:

Let the unknown number be k

(45 x k) / 100 = 25

45k/100 = 25

multiply both sides by 100

45k = 25 x 100

45k = 2500

divide both sides by 45

k = 2500/45

k = 55.56

6 0
3 years ago
Please help!! It's due in an hour!!
Agata [3.3K]

Answer: 2 feet below normal

6 0
3 years ago
Read 2 more answers
Over the last 3 years, salesperson A has earned twice as much as salesper B who in turn has averaged 50% more than salesper C. T
bekas [8.4K]
<span>A has earned twice as much as B so: A=2B
B has averaged 50% more than C so: B=C+0.5C
Combined is 220K, So A+B+C=220,000

The last equation can be re-written as:
2B+1.5C+C=220K
AND since A=2B, it can be rewritten again as:
3C+1.5C+C=220K

Now you can get C finally, since B=1.5C you can get B, then to get the average, just divide that by 3 (years) and you should be done.
So B = 60000 for 3 years</span>
4 0
3 years ago
Read 2 more answers
The tourists went in the first hour with a speed of 3.5km/h to the bus station, realizing that they would arrive 1 hour late at
mestny [16]
The answer should be 4.25km
7 0
3 years ago
Other questions:
  • Eight times the sum of 11 and a number is 123. Which equation below can be used to find the unknown number
    15·2 answers
  • Find an equation of the tangent plane to the surface at the point . Question 14 options: a) b) c) d) e)
    9·1 answer
  • Complete the recursive formula of the geometric sequence −0.56 ,−5.6 ,−56 ,−560,..
    8·1 answer
  • Which is the best estimate of the distance between the point (-25, 10) and the origin?
    14·2 answers
  • Answer the one that’s is blank
    14·2 answers
  • Need help with question in picture
    6·1 answer
  • If the slope of a line is 3 and a point on the line is (-4, 6), then find two other points on the line
    7·2 answers
  • Jane spent $48 on her mom's Christmas gift. This is 55% of the total money she has saved. How much does Jane have saved?
    8·1 answer
  • The equations y = 2x - 5 and y = 13.x
    6·1 answer
  • A
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!