SAT Prep Review Assignment

If the mean of 2, 4, 6, and b is 4.2, what is the average (arithmetic mean) of these four numbers?

• 4

• 4.1

• 4.2

• 4.3

if the ratio of a to b is 3 to 4, and the ratio of a to c is 5 to 2, what is the ratio of b to c?

• 3 to 10

• 3 to 5

• 5 to 3

• 10 to 3

• The standard deviation of quiz scores in Class A is smaller.

• The standard deviation of quiz scores in Class B is smaller.

• The standard deviation of quiz scores in Class A and Class B are the same.

• The relationship cannot be determined from the information.

• I and II only

• I and III only

• II and III only

• I, II, and III

• $\frac{4}{25}$

• $\frac{10}{25}$

• $\frac{11}{25}$

• $\frac{16}{25}$

• 
• 
• 
• 

• -6

• 1

• 9

• 3

• 1

• 7

• 16

• 79

• 
• 
• 
• 

• 
• 
• 
•