There isn't enough information because we don't know the amount Jill brought. We know the amounts Bill and Mike bought, but we know nothing about Jill.
Arguably, all of them are at least somewhat biased, but the most biased would be <span>surveying people 15 to 20 years old leaving a concert </span> because being at a concert would be highly correlated with liking the type of music played at that concert.
These are vertical angles and vertical angles are congruent. So you set them equal to each other
5x+12=6x-10
-5x -5x
12= x-10
+10 +10
X=22
Answer:
Mean = 3.7
Variance = 2.61
Step-by-step explanation:
From the data given; we can represent our table into table format for easier solution and better understanding.
Given that:
A highway engineer knows that his crew can lay 5 miles of highway on a clear day, 2 miles on a rainy day, and only 1 mile on a snowy day
Let X represent the crew;
P(X) represent their respective probabilities
clear day rainy day snowy day
X 5 2 1
P(X) 0.6 0.3 0.1
From Above; we can determine our X*P(X) and X²P(X)
Let have the two additional columns to table ; we have
X P(X) X*P(X) X²P(X)
5 0.6 3 15
2 0.3 0.6 1.2
1 0.1 0.1 0.1
Total 1.0 3.7 16.3
The mean
can be calculated by using the formula:

Therefore ; mean
= 3.7
Variance 
Variance = 16.3 -3.7²
Variance = 16.3 - 13.69
Variance = 2.61
It’s less than because it is a negative number