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andrew-mc [135]
3 years ago
15

Each day in Bio 18, Derek leaves a stack of paper packets near the entry door for students to obtain. Eighty-one percent of stud

ents grab a packet before being seated. If we observe a random selection of nine students, what is the probability that exactly two students sit first before grabbing a packet.
Mathematics
1 answer:
Rainbow [258]3 years ago
5 0

Answer:

Step-by-step explanation:

This is a binomial probability distribution because there are only 2 possible outcomes. It is either a randomly selected student grabs a packet before being seated or the student sits first before grabbing a packet. The probability of success, p in this scenario would be that a randomly selected student sits first before grabbing a packet. Therefore,

p = 1 - 0.81 = 0.91

n = 9 students

x = number of success = 3

The probability that exactly two students sit first before grabbing a packet, P(x = 2) would be determined from the binomial probability distribution calculator. Therefore,

P(x = 2) = 0.297

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Pls help?? A 3D shape has the net shown below.
tia_tia [17]

This question is incomplete because it lacks the picture of the appropriate diagram.

Find attached the diagram of the 3D shape.

Answer:

Edges: 6

Faces: 7

Vertices : 6

Step-by-step explanation:

3 Dimensonal (3D) shapes are shaped such that have faces, edges and vertices. From the numbers of faces, edges and vertices a 3D image has, you can tell or determine the type of solid shape it is.

Face: A face is the flat surface of a solid figure. Faces of 3D shapes comes in various forms such as triangles, rectangles, and pentagons.

Edge: An edge is defined as the straight line where two faces are connected to each other.

Vertices or a vertex: This can be defined as the point where edges connect or meet.

The 3D image in the question has :

6 Edges, 7 faces and 6 Vertices

5 0
3 years ago
How do you find the slope in these two equations: 3x+7=-2 , -y-5=-9
wolverine [178]
3x+7= -2
+2. +2
0=3x+9
The slope is 3.
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4 0
3 years ago
Choose the correct definition. Group of answer choices Sensitivity refers to the probability that a test correctly classifies as
Paraphin [41]

Answer:

the probability that a test correctly classifies as positive individuals who have preclinical disease

Step-by-step explanation:

Sensitivity represents the true positive percentage

Lets take an example if there is 90% sensitivity that means there are 90% people who have the target disease considered the test positive

So according to the given options, it is the probability in which if the test is done in a correct manner so this means that the positive individuals have the preclinical disease

Therefore the first option is correct

3 0
3 years ago
Which is equivalent to 3^4
musickatia [10]

Answer:

81

Step-by-step explanation:

3^4

=3*3*3*3

=81

Hope this helps!!

8 0
3 years ago
A store is having a sale on shoes. The sale is buy one pair of shoes get 50% off. The original price of one pair is $52.98. All
Harman [31]

Answer:

if it was 50% off the cost would be $145.64

Step-by-step explanation:

291.29 / 1/2= 145.64

50% = 1/2

7 0
3 years ago
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