Answer:
(a) The probability of the intersection of events "man" and "yes" is 0.55.
(b) The probability of the intersection of events "no" and "man" is 0.10.
(c) The probability of the union of events "woman" or "no" is 0.45.
Step-by-step explanation:
The information provided is:
Yes No Total
Men 275 50 325
Women 150 25 175
Total 425 75 500
(a)
Compute the probability that a randomly selected employee is a man and a has retirement benefits as follows:
![P(M\cap Y)=\frac{n(M\cap Y)}{N}=\frac{275}{500}=0.55](https://tex.z-dn.net/?f=P%28M%5Ccap%20Y%29%3D%5Cfrac%7Bn%28M%5Ccap%20Y%29%7D%7BN%7D%3D%5Cfrac%7B275%7D%7B500%7D%3D0.55)
Thus, the probability of the intersection of events "man" and "yes" is 0.55.
(b)
Compute the probability that a randomly selected employee does not have retirement benefits and is a man as follows:
![P(N\cap M)=\frac{n(N\cap M)}{N}=\frac{50}{500}=0.10](https://tex.z-dn.net/?f=P%28N%5Ccap%20M%29%3D%5Cfrac%7Bn%28N%5Ccap%20M%29%7D%7BN%7D%3D%5Cfrac%7B50%7D%7B500%7D%3D0.10)
Thus, the probability of the intersection of events "no" and "man" is 0.10.
(c)
Compute the probability that a randomly selected employee is a woman or has no retirement benefits as follows:
![P(W\cup N)=P(W)+P(N)-P(W\cap N)=\frac{175}{500}+\frac{75}{500}-\frac{25}{500}=0.45](https://tex.z-dn.net/?f=P%28W%5Ccup%20N%29%3DP%28W%29%2BP%28N%29-P%28W%5Ccap%20N%29%3D%5Cfrac%7B175%7D%7B500%7D%2B%5Cfrac%7B75%7D%7B500%7D-%5Cfrac%7B25%7D%7B500%7D%3D0.45)
Thus, the probability of the union of events "woman" or "no" is 0.45.
Answer: ![c=-\frac{3}{4}](https://tex.z-dn.net/?f=c%3D-%5Cfrac%7B3%7D%7B4%7D)
Step-by-step explanation:
Find the x-coordinate of the vertex with this formula:
![x=\frac{-b}{2a}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-b%7D%7B2a%7D)
In this case:
![a=4\\b=-10](https://tex.z-dn.net/?f=a%3D4%5C%5Cb%3D-10)
Substituting values, we get:
Now we can substitute the coordinates of the vertex into the equation
and then solve for "c".
Then:
![-7 = 4(\frac{5}{4})^2 -10(\frac{5}{4}) + c\\\\-7+\frac{25}{4}=c\\\\c=-\frac{3}{4}](https://tex.z-dn.net/?f=-7%20%3D%204%28%5Cfrac%7B5%7D%7B4%7D%29%5E2%20-10%28%5Cfrac%7B5%7D%7B4%7D%29%20%2B%20c%5C%5C%5C%5C-7%2B%5Cfrac%7B25%7D%7B4%7D%3Dc%5C%5C%5C%5Cc%3D-%5Cfrac%7B3%7D%7B4%7D)
Answer:
y = 1/2x - 2
Step-by-step explanation:
Slope intercept form:
y = mx + b
x - 2y = 4
-2y = -x + 4
2y = x - 4
y = 1/2x - 2
Answer:
18) 6x^2-7x-5
19) 20x^2+17x-63
20) 18x^2-20x+2
21) 5x^2+42x+16
Step-by-step explanation:
Perimeter=length×breadth
18) (3x-5)(2x+1)
=6x^2+3x-10x-5
=6x^2-7x-5
19) (4x+9)(5x-7)
=20x^2-28x+45x-63
=20x^2+17x-63
20) (18x-2)(x-1)
=18x^2-18x-2x+2
=18x^2-20x+2
21) (5x+2)(x+8)
=5x^2+40x+2x+16
=5x^2+42x+16
Answer:
Square root of 98
Step-by-step explanation: