Problem 3.1: What is the mean average of
{13, 15, 19, 13}?
Problem 3.2: What is the mean average of
{7, 12, 3, -2, -4, 14}?
Problem 3.3: What is the mean average of
{4, 13, 0, -12, -2, 21, -17}?
Problem 3.4: What number must be added to the set
{2, 6, 12, 0} to yield an average of 6?
Problem 3.5: What number must be added to the set
{7, -7, 15} to yield an average of -5?
Problem 3.6: Jonah receives the following scores on his biology tests:
{95, 99, 92, 89}.
a) If
100 is the highest grade possible on a test, and there is one test left, what is the highest average Jonah can get?
b) What is the minimum score he needs on the final test to get an A (at least
90 average) in the class?
Problem 3.7: Kat receives the following scores on her chemistry tests:
{88, 92, 74, x, 94, 85}.
a) If
x = 80, what is Kat's average?
b) If Kat's average is
83, what is
x?
c) If the highest possible score on a test is
100, can Kat get a
90 in the class?
