Answer:
As a fraction, the answer is exactly 86/969
In decimal form, the answer is approximately 0.08875
=====================================================
Work Shown:
The assumption is that no replacements are made for each selection.
5 red, 6 blue, 8 green
5+6+8 = 19 total
A = P(3 red) = (5/19)*(4/18)*(3/17) = 10/969
B = P(3 blue) = (6/19)*(5/18)*(4/17) = 20/969
C = P(3 green) = (8/19)*(7/18)*(6/17) = 56/969
D = P(3 all same color)
D = A+B+C
D = 10/969 + 20/969 + 56/969
D = (10+20+56)/969
D = 86/969
D = 0.08875
This photo is the explanation
Answer:
150 boys were enrolled in 2012
Step-by-step explanation:
Let the number of boys enrolled in 2012 be x
Let the number of girls enrolled in 2012 be x + 200
Ratio of boys to girls in 2012 enrollment = 3/7
Now;
3/7 = x/x + 200
7x = 3(x + 200)
7x = 3x + 600
7x - 3x = 600
4x = 600
x = 600/4
x = 150 boys
Hence, 150 boys were enrolled in 2012
Answer:
B) 49,062.5 ft²
Step-by-step explanation:
The area of a circle can be found using the following equation:
A(c) = πr²
Note:
A(c) = Area of circle
π = pi = 3.14
r = radius
The diameter of the circle is given to you. To find the radius, simply divide the diameter by 2:
Diameter/2 = Radius
Radius = 250/2 = 125
Next, plug in 125 into the Area formula for circle for r:
A(c) = πr²
A(c) = π(125)²
A(c) = π * 15625
A(c) = 3.14 * 15625
A(c) ≈ 49062.5
B) 49,062.5 ft² is your answer.
~