Which of the following is the mean of the test scores listed below? 100, 78, 47, 84, 93, 78
A. 80
B. 78
C. 96
D. 87
The mean of a data set is the total scores divided by the number of tests.
Total test scores =100+78+47+84+93+78=480
Number of tests =6
Mean test score =480/6=80
The mean test score is 80.
Therefore, the Correct Answer is A.
More Questions on TEAS 7 Math
-
Q #1: A child has collected 50 pennies, 40 nickels, 25 dimes, and 5 quarters. Which of the following charts accurately organizes the number of coins? Chart 1 Chart 2 Chart 3 Chart 4
A. Chart 1
B. Chart 2
C. Chart 3
D. Chart 4
Answer Explanation
By inspection, we find the corresponding values of the given denominations in the following manner.
-
Q #2: Solve for x in the equation above.
A. x=rwy+z
B. x=rw(y-z)
C. x=y(z+rw)
D. x=rwy+z
Answer Explanation
We are asked to make x the subject of the formula.
First, we add z to both sides of the equation
Multiply both sides by y
The above equation can be rearranged into
Thus, the formula for finding the value of x is y(z+rw).
-
Q #3: The American with Disabilities Act (ADA) requires that the slope of a wheelchair ramp be no greater than 1:12. Which of the following is the minimum length of a ramp needed to provide access to a door that is 2.5 feet above the sidewalk?
A. 25 feet
B. 145 feet
C. 32.5 feet
D. 30 feet
Answer Explanation
The slope represent the ratio between the vertical height to the horizontal length. Let x be the minimum length of the ramp, we can set a proportion with height on the numerator and length on denominator. Then,
Cross-multiply to find the value of x
Thus, the minimum length of the ramp needed is 30 feet to access to a door that is 2.5 feet above the sidewalk.
