Answer:
8.08 %
Step-by-step explanation:
Let us denote :
score X follows a normal distribution with mean
and standard deviation 
Step 2
The probability that someone scored 21.9 or less is :





Answer : 
Answer:21
Step-by-step explanation: solve whats in the numerator then solve whats in the denominator then you divide
Answer: B
Step-by-step explanation: B, because lines A and C would more likely connect to B