Answer:
b and c
Step-by-step explanation:
Answer: 50%
Step-by-step explanation:
X= A) 80 I believe you double 120 to 240 and divide by the 4 quarters.
Answer:
The number is
students
Step-by-step explanation:
From the question we are told that
The population mean is
The standard deviation is 
The sample size is n = 2000
percentage of the would you expect to have a score between 250 and 305 is mathematically represented as

Generally

So


From the z table the value of 
and 


The percentage is 
The number of students that will get this score is

