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lys-0071 [83]
4 years ago
7

There are 9 students in a class: 5 boys and 4 girls.

Mathematics
1 answer:
vaieri [72.5K]4 years ago
8 0

Answer:

5/126

Step-by-step explanation:

Let's go through this scenario step-by-step. At the beginning, we have a 5/9 possibility of picking a boy - 5 boys out of 9 students. If we pick 1 boy, we now have 4 boys out of 8 students we could potentially pick, giving us a 4/8 or 1/2 chance of picking a second boy after the 1st. For the third boy, we have 3 out of 7 remaining students, giving us a 3/7 chance of picking a third after the first two, and for the fourth boy, we 2 possibilities out of 6, giving us a 2/6 or 1/3 chance of picking the 4 boys.

To find the total probability, we can multiply all of these individual ones together:

\frac{5}{9} \cdot\frac{1}{2} \cdot\frac{3}{7} \cdot\frac{1}{3}\\\\=\frac{5}{9} \cdot\frac{1}{2} \cdot\frac{1}{7}\\\\=\frac{5}{126}

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Dvinal [7]

This will cost:

$4.36.

To solve, first multiply 3.78 by 137.64. We want to know how much Yen it costs for a gallon. The answer will be 520.2792.

After, use 520.2792 and divide by 119.33. This will tell how much it costs in dollars. Then, the answer should be 4.36000335205.

Finally, round 4.36000335205 to the nearest hundredth. The answer would be $4.36.

8 0
3 years ago
4c = d for c<br> Solve for indicated variable.
motikmotik

Answer:

c=1/4d

Step-by-step explanation:

4 0
3 years ago
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HELP PLEASE! I tried everything from multiplying, dividing, adding, and subtracting but still no correct answer. Can someone ple
alisha [4.7K]
<h3>Answer:  110 square miles</h3>

=============================================================

Explanation:

There are a few ways to do this.  

One method involves drawing a horizontal line to form three rectangles as show below. Note the labels A,B,C.

  • Rectangle A in the upper left corner has area of base*height = 6*7 = 42 square miles. I'll let A = 42 since we'll use it later.
  • Rectangle B is 20 miles across horizontally (base) and 2 miles tall vertically (height). The 2 miles is from 9-7 = 2. The area of rectangle B is 20*2 = 40 square miles. Let B = 40.
  • Then finally, C = 28 because rectangle C is 4 miles across and 7 miles tall, so 4*7 = 28.

Add up those three sub areas found: A+B+C = 42+40+28 = 110 square miles

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

There are other methods you could do. A second method is to draw two vertical lines to form 3 other rectangles, then add up the sub areas to get 110.

A third method is to draw a horizontal line across the top to form one large rectangle (20 mi by 9 mi) and subtract off the area of the 7 mi by 10 mi inner rectangle (the empty space), so you'd say 20*9 - 7*10 = 180-70 = 110

5 0
3 years ago
What is the maximum number of y-intercepts a line can have?<br> I will mark brainliest!
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Answer:

one

Step-by-step explanation:

The maximum number of y intercepts a line can have is one

A line can only cross the y axis one time

A line can only cross the x axis one time

Otherwise it is not linear

3 0
3 years ago
HELP me please look at the picture
Effectus [21]
The answer is 17 you are correct
3 0
3 years ago
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