# Group-ch4 - Web4students

MA 116 – Chapter 4 – Basics of Probability –
Some problems to review what you studied over the weekend
Name___________________
1) In a class there are 10 female students and 4 male students. If I select a student at random,
a) P(female) =
b) P(male) =
c) Find the P(male) using the complement rule.
2) Roll a die. What is the probability of rolling:
a) An even number
b) A number less than 2 or greater than 5?
c) An odd number or a number smaller than 4?
A
B
C
D
F
Totals
Math 180
Math 116 – 10 am
3
5
8
4
8
28
4
7
4
5
5
25
Math
116 – 1
pm
8
7
4
4
1
24
Totals
15
19
16
13
14
77
3) Here we have a table of the number of students who passed and failed the first test per
class. If we select ONE student at random, what is the probability that
a) The student is from the 10 am Statistics class?
b) The student passed the test with a C or is from the 1 pm Statistics class?
c) The student is from the Math 180 and failed the test?
d) The student is from a statistics class or passed the test with A or B?
4) If we select two students at random, what is the probability that the first student is from the
Precalculus class and the second student is from the 10 am Statistics class?
a) With replacement
b) Without replacement
5) If we select two students at random, what is the probability that the two students are from the
Precalculus class?
a) With replacement
b) Without replacement