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just olya [345]
2 years ago
7

180 students in a tenth grade high school class take a survey about which video game consoles they own.

Mathematics
1 answer:
Fantom [35]2 years ago
5 0

Answer:

P(A) = 44.44%

P(B) = 50%

P(B|A) = 37.5%

P(B|A) different from P(B).

A and B are independent.

Step-by-step explanation:

If we have a total of 180 students, and 80 of them have a Playstation, we have that P(A) = 80/180 = 0.4444 = 44.44%

If we have 90 students that have a Xbox, we have that P(B) = 90/180 = 0.5 = 50%

If we have 30 students that have both consoles, we have that P(A and B) = 30/180 = 0.1667 = 16.67%

To find P(B|A), we will find for a student that has an Xbox inside the group of students that has a Playstation, that is, we have 30 students in a total of 80 students, so P(B|A) = 30/80 = 0.375 = 37.5%

P(B|A) is different from P(B), the first is 37.5% and the second is 50%, so events A and B are independent events.

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X=-12-6y <br>-4x+5y=-39<br>slove by the system of substitution
Artist 52 [7]
X = -6y - 12
4x + 5y =-39

                  4x + 5y = -39
     -4(-6y - 12) + 5y = -39
-4(-6y) + 4(12) + 5y = -39
       24y + 48 + 5y = -39
               29y + 48 = -39
                       29y = -87
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x = -6y - 12
x = -6(-3) - 12
x = 28 - 12
x = 6

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5 0
3 years ago
C. Polynomial functions: y = x4 - 3x2 - 3<br>Leading term<br>Leading coefficient :<br>Degree:​
MrRissso [65]

Answer:

Step-by-step explanation:

hello : here is an solution

Leading coefficient :  1  , 0  , -3  ,0  , -3   because : y = 1x4+0x^3 - 3x2+0x - 3

Degree:​ 4

3 0
2 years ago
Required
snow_lady [41]

Answer:

19

Step-by-step explanation:

70 - 51 = 19

To check:

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5 0
2 years ago
How to solve this problem for every question
SOVA2 [1]
Do you know how to solve it because I can't see the problem
8 0
3 years ago
B + 7 + 12 = 13 ? Please tell me how you did it! Thanks.
svet-max [94.6K]

The answer you are looking for is b = -6.

There are 2 ways to find this. You could use...

  1. Add together 7 and 12 to get 19, then subtract 19 from both sides to get b = -6. OR...
  2. Subtract 12 from both sides to get b + 7 = 1, then subtract 7 from both sides to get b = -6.

Either way, you will get the same answer of b = -6. One method is just longer than the other. I hope this helps!


7 0
3 years ago
Read 2 more answers
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