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Alja [10]
3 years ago
8

A teacher chooses two students in a class of 15 girls and 10 boys. The students are randomly chosen. What is the probability tha

t the teacher chooses two girls?
1. 3/5
2. 3/7
3. 7/12
4. 7/20
Mathematics
1 answer:
Stella [2.4K]3 years ago
7 0

Answer:

15/25 which simplifies to 3/5 which is the first answer

Step-by-step explanation:

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Pedro is doing math exercises from a software program he recently purchased. In the program, you have to get at least 70% of the
Nookie1986 [14]
The inequality would be
0.75q ≥ 0.70(q+1)

q is defined as the number of questions he answers after the first one.  We are told he gets 75% of those correct; 75%=75/100=0.75.  This gives us 0.75q.

Since he gains proficiency on the exercises, the total number he gets correct has to be at least 70%.  This means the inequality would have the symbol greater than or equal to, as it cannot be less and have him gain proficiency.

He has already answered 1 question and answers q more; this gives us a total of q+1.  Since he gains proficiency, the cutoff was 70%; 70%=70/100=0.70.  This gives us the expression 0.70(q+1).

Our total inequality would then be 0.75q ≥ 0.70(q+1)
3 0
3 years ago
Read 2 more answers
What is the kinetic energy of an object of mass of 30 K moving with a speed of 15 M/S2
ale4655 [162]

You literally need to apply the formula

K=\dfrac{1}{2}mv^2

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5 0
3 years ago
Around 1,100 scientists live in Antarctica during the winter. In the summer that number increases to around 5,000 scientists. As
Blababa [14]

Answer:

<h3> 78%</h3>

Step-by-step explanation:

Given

Number of scientist that line in Antarctica during the winter = 1,100

Amount of scientist  in the summer = 5,000

Increment = 5000 - 1100

Increment  = 3900

percentage change = Increment/Original amount * 100

Percentage change = 3900/5000 * 100

Percentage change = 3900/50

Percentage change = 78%

<em>Hence the percent change in the number of scientists living in Antarctica is 78%</em>

6 0
3 years ago
If the value of point is 3/2 and |Q| is 5/4 then the greatest value of P+Q is
Ne4ueva [31]

Answer:

11/4 or 2 3/4

Step-by-step explanation:

3/2+5/4

(3x4) + (5x2)=2x4

=22/8

=22÷2

=8÷2

=11/4 or 2 3/4

5 0
3 years ago
Which equation represents the line that passes through points (0, 6) and (2, 0)?
poizon [28]
Slope = 6/-2 = -3
b = 6

equation
y = -3x + 6

hope it helps
4 0
3 years ago
Read 2 more answers
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