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 is the first step used in solving this equation 2x+9y=28 and 3x-3y=14. Identify the variable that will be solved for when y
umka2103 [35]

Answer:

Multiply the second equation's terms by 3. Solve for x.

Step-by-step explanation:

You will get:

2x+9y=28

9x-9y=42

Add them to get:

11x=70.

You can solve from there.

7 0
3 years ago
Is the difference of two positive rational number always positive explain
Dominik [7]
No . . . while the difference represents the absolute magnitude between two numbers . . . for example . . .

<em>The difference between 5 and 2 is . . . 3</em>
<em>The difference between 6.4 and 9.5 is . . . 3.1</em>

 . . . there is still the chance that the difference may be zero . . . in which case the difference is neither positive nor negative

. . . so in short . . . the answer is . . . <u><em>NO</em></u>

5 0
3 years ago
The perimeter of the first rectangle below is 120 inches. The perimeter of the second rectangle is 180 inches. What are the valu
8_murik_8 [283]

Answer:

A

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
In a certain board game, a 12-sided number cube
alexandr1967 [171]

Answer:

4/27 ezzzzzzzzzzzzzzzzzzzz

8 0
2 years ago
Three pairs of gloves- a red pair, a blue pair, and a green pair-are in a drawer. If the gloves are removed at random without re
balandron [24]

Answer:

4

Step-by-step explanation:

Given that three pairs of gloves- a red pair, a blue pair, and a green pair-are in a drawer.  The gloves are removed at random without returning any to the drawer.

We have to find the minimum number that must be removed in order to guarantee having a matched pair of gloves

No of different colours = 3 (red, blue, green)

Hence no of gloves that must be removed = 3+1

If 4 gloves are removed, only 3 can be of different colours 1 will have same colour as any one of the three.

So a pair of same colour would be obtained

Answer is 4

8 0
3 years ago
Other questions:
  • How do you find the cot θ if csc θ = square root of five divided by two and tan θ &gt; 0.
    9·1 answer
  • Assume that adults have iq scores that are normally distributed with a mean of 100100 and a standard deviation of 15. find the t
    11·1 answer
  • There are 4 cups in a quart and 4 quarts in a gallon.how many cups are in a 5 gallon jug of water​
    7·1 answer
  • WILL GIVE 12 POINTS A BRAINLIEST THANKS AND A 5 star Rating
    15·1 answer
  • A certain type of bird lives in two regions of a state. The distribution of weight for birds of this type in the northern region
    15·1 answer
  • tinas salsa class membership which s $15 is deducted automatically from her bank account every month. which expression show the
    10·1 answer
  • I need help with this question
    14·1 answer
  • 17. The local hiking club went on a five day huling trip to Denali Nations
    14·1 answer
  • Please help and thank you!
    13·1 answer
  • ???????????????????? :((​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!