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Probability Galculations
The following calculations use the PROB menu and the relationship:
probability
of
an event
:
#
of
combinations
that
produce
the
event
total
#
of
combinations
A
company
employing
L4
women and
L0
men is
forming
a
six-person
committee
to
deal
with
health and safety
issues.
Part 1: How
many different combinations
of
people are
possible?
Keys:
Display:
Description:
IFmB-l
Displays the
PROB
menu.
24
ffi
x=24.oEBB
Stores
number of
employees.
6
Y=E
,
EBBa
Stores
committee
size.
C
H,
Y=134, 596,
ABBB
Calculates
number of
combinations.
Part 2:
If
employees
are chosen at random, what
is the probability
that the
committee
will
contain six women?
lEro-l
1
c
x,
Y=134, sg6.
ggBB
Stores
previous result.
14
$
H=I4,gBgB
Stores
number of women
employees.
C
H,Y=3,gg3.6A8B
Calculates
number of
combinations
of
six
women.
Emar 1E
B,8223
Probability
of
committee
being
all
women.
9: Additional
Eramples
163
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