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MatroZZZ [7]
3 years ago
13

Event A has a 0.3 probability of occuring and event B has a 0.4 probability of occuring. A and B are independent events. What is

the probability that either A or B occurs?
0.42

0.54

0.70

0.12
Mathematics
2 answers:
GarryVolchara [31]3 years ago
4 0
When you say either, you add both A and B
0.3+0.4=0.7
Your answer is 0.70 which means 70%
Varvara68 [4.7K]3 years ago
3 0

Answer:

The probability that either A or B occurs is 0.58

Step-by-step explanation:

P(A) = 0.3

P(B) =0.4

Since we are given that A and B are independent events

So, P(A∩B)=P(A)*P(B)

P(A∩B)=0.3*0.4=0.12

So, P(A∪B)= P(A)+P(B)-P(A∩B)

P(A∪B)= 0.3+0.4-0.12

P(A∪B)=0.7-0.12

P(A∪B)=0.58

Now, the probability  that either A or B occurs (or both occurs) = P(A∪B)+P(A∩B)

= 0.58

Thus,the probability that either A or B occurs is 0.58

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Students reported practicing violin during the last semester for 45, 38, 52, 58, and 42 hours. What is the mean absolute deviati
Irina-Kira [14]

The mean absolute deviation for the number of hours students practiced the violin is 6.4.

<h3>What is the mean absolute deviation?</h3>

The average absolute deviation of the collected data set is the average of absolute deviations from a center point of the data set.

Given

Students reported practicing violin during the last semester for 45, 38, 52, 58, and 42 hours.

The given data set is;

45, 38, 52, 58, 42

Mean Deviation = Σ|x − μ|/N.

μ = mean, and N = total number of values

|x − μ| = |45 − 47| = 2

|38− 47| = 9

|52− 47| = 5

|58− 47| = 11

|42− 47| = 5

The mean absolute deviation for the number of hours students practiced the violin is;

\rm Mean =\dfrac{2+9+5+11+5}{5}\\\\Mean=\dfrac{32}{5}\\\\Mean = 6.4

Hence, the mean absolute deviation for the number of hours students practiced the violin is 6.4.

To know more about mean value click the link given below.

brainly.com/question/5003198

8 0
2 years ago
Julio bought 4 pounds of apples and one bag of oranges at the store. The apples cost $1.75 per pound and the bag of oranges cost
vaieri [72.5K]

Answer: $9.99

Step-by-step explanation:

There are 4 pounds of apples with each pound costing $1.75.

There is one bag of orange with a bag costing $2.99.

Total = (4 * 1.75) + 2.99

= 7 + 2.99

= $9.99

5 0
3 years ago
RS bisects QRT, mangleQRS = (3x + 8), and mangleSRT = (5x − 4).
Leya [2.2K]

Bisect typically means half but since we aren't given angle at the start so we can just have to solve for x.

(3x + 8) = (5x - 4)

3x = 5x - 12

-2x = -12

x = 6

Best of Luck!

5 0
3 years ago
A line with slope -2 and y-intercept 4 <br>enter the equation of the line in slope intercept form.
Hitman42 [59]
-2x + 4 = y because the slope intercept form is mx+b=y
4 0
3 years ago
Which ordered pair is a solution of the equation?<br> y=4x−7
vampirchik [111]

Answer:

Unknown

Step-by-step explanation:

Hi! so you didn't add the ordered pair options but I will do my best :) so if you see the ordered pair (0.7) that could definitely be a solution because using the slope intercept form equation you gave I know that's our y Intercept. the slope is 4/1 so moving up 4 and to the right 1 or down 4 and to the left 1 on a graph could show you more points! If you don't want to draw it you could use Desmos and just put this equation in or give me the ordered pairs and I will give you your answer!

hope this helps :)

8 0
2 years ago
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