MATH 110 TEST 4 WITH CORRECT
ANSWERS 2025
How do you find the expectation of a situation? ( correct
answers ) Multiply each possible outcome
by the probability they occur and add the results.
When dealing with expectation questions involving gambling what should
you always do? ( correct answers ) Multiply the money bet
What does I, P,
with possible r, t, and n ( correct answers )
winnings.
P=principal (original $ I=Interest
value) r=Interest rate
t= time (# of years)
n= Compound value (# of time compounded per year)
Mean ( correct answers ) Average (find by adding all the elements up
and divide by the total # of elements)
What is the exact method and what is the original method? Which one
should you use? ( correct answers ) -Used for converting t from days to
years
Exact method- #of days/365
Ordinary method: #of days/360. (Use ordinary)
Median ( correct answers ) The middle value or mean of the 2 middle
values.
Mode ( correct answers ) the value that occurs most frequently may be
one or more or none
Weighted mean ( correct answers ) Used when not all values are
equally important (have different weights)
Weighted mean formula ( correct answers ) Sum of (value x
weights)/total weights
How would you solve the following "In a math class, one of your 4 test
scores is dropped. On the first three tests, you have the following scores:
71, 37, and 95. What score do you need on the next test for your average
to be 75 (assuming you drop the lowest test score)?" ( correct answers )
Take your highest scores (71 and 95), add them
together, plus x (last test score), divided by number of elements (3)
equaled to the wanted class average (75).
ANSWERS 2025
How do you find the expectation of a situation? ( correct
answers ) Multiply each possible outcome
by the probability they occur and add the results.
When dealing with expectation questions involving gambling what should
you always do? ( correct answers ) Multiply the money bet
What does I, P,
with possible r, t, and n ( correct answers )
winnings.
P=principal (original $ I=Interest
value) r=Interest rate
t= time (# of years)
n= Compound value (# of time compounded per year)
Mean ( correct answers ) Average (find by adding all the elements up
and divide by the total # of elements)
What is the exact method and what is the original method? Which one
should you use? ( correct answers ) -Used for converting t from days to
years
Exact method- #of days/365
Ordinary method: #of days/360. (Use ordinary)
Median ( correct answers ) The middle value or mean of the 2 middle
values.
Mode ( correct answers ) the value that occurs most frequently may be
one or more or none
Weighted mean ( correct answers ) Used when not all values are
equally important (have different weights)
Weighted mean formula ( correct answers ) Sum of (value x
weights)/total weights
How would you solve the following "In a math class, one of your 4 test
scores is dropped. On the first three tests, you have the following scores:
71, 37, and 95. What score do you need on the next test for your average
to be 75 (assuming you drop the lowest test score)?" ( correct answers )
Take your highest scores (71 and 95), add them
together, plus x (last test score), divided by number of elements (3)
equaled to the wanted class average (75).
