MATH1342
LAB (PROJECT) 4 (Chapter 5)
NAME:
________________
Collin County College
FAll 2011
Instructor:
Daryl Rupp
DUE DATE 9/20/11
The following table shows the students grades (A’s, B’s, etc.) from both periods.
Find the probabilities requested.
SHOW THE ANSWERS IN FRACTIONAL FORM AND THEN
ROUND THE DECIMAL ANSWERS TO THREE PLACES.
►
FIRST COMPLETE THE TABLE ABOVE BY ADDING THE
TOTALS OF ALL ROWS AND COLUMNS.
Part I.
(35 POINTS)
1.
If you were to select one student from either period, what is the probability of
selecting a student who received a B?
2.
If you were to select only
one
student from either period, what is the probability
of selecting a student who received a B
and
is from the First period?
3.
If we were to select just
one
student from either period and one event is
selecting a student who received an A and another event is selecting a student
who received a C, then
a.
Are these two events mutually exclusive?
_____________.
GRADE
A
B
C
D
F
TOTAL
PERIOD
FIRST
14
9
3
0
0
SECOND
19
2
3
1
1
TOTAL
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What is the probability of selecting just
one
student from either period who
received an A
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 Fall '12
 LisaJuliano
 Math, Period, Daryl Rupp, Collin County College

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