* -21x + 9y = 66
21x + 28y = 28
37y= 94
y= 94/37
* -3x - 4y = -4
-3x - 4(94/37)= -4
-3x = -4 + (4*(94/37))
Answer:
1/7 ;
0.0034
Step-by-step explanation:
Given that:
X = 1/14, 1/7, 3/14
n = number of observations = 3
Since, probability of X is equally likely ;
P(X) = Σp(x) = 1 ; p(x) = 1/n = 1/3
The mean, m ;
Σx*p(x) = (1/3 * 1/14) + (1/3 * 1/7) + (1/3 * 3/14)
= 1/42 + 1/21 + 3/42
= (1 + 2 + 3) / 42
= 6 / 42
= 1/7
The variance :
Σx²*p(x) - m²
((1/3) * (1/14)^2) + ((1/3) * (1/7)^2) + ((1/3) * (3/14)^2) - (1/7)^2
= 0.0238095 - 0.0204081
= 0.0034014
= 0.0034
Answer:
(7, - 5 )
Step-by-step explanation:
A is positioned at (7, - 5 )
Answer:
red and white are impostors
Step-by-step explanation:
they were running
