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Probability
Mathematics, Grade 5
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Study Guide Probability Mathematics, Grade 5
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PROBABILITY
What
is
probability?
Probability
is
the
measure
of
how
likely
an
event
is.
Total
ways
a
specific
outcome
will
happen
Total
number
of
possible
outcomes
The
probability
of
event
A
is
the
number
of
ways
event
A
can
occur
divided
by
the
total
number
of
possible
outcomes.
Example:
A
spinner
has
4
equal
colored
sections;
yellow,
blue,
green,
and
red.
After
spinning
the
spinner,
what
is
the
probability
of
landing
on
each
color?
The
possible
outcomes
are
yellow,
blue,
green,
and
red.
Use
the
formula
to
determine
the
probability
of
landing
on
each
color:
Probabilities
Number
of
chances
to
land
on
yellow
P(yellow)
=
total
number
of
colors
=
1
4
Number
of
chances
to
land
on
blue
P(blue)
=
total
number
of
colors
=
1
4
Number
of
chances
to
land
on
green
P(green)
=
total
number
of
colors
=
1
4
Number
of
chances
to
land
on
red
P(red)
=
total
number
of
colors
=
1
4
Probability
=
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Try
This!
1.
A
glass
jar
contains
6
red,
5
green,
8
blue
and
3
yellow
marbles.
If
a
single
marble
is
chosen
at
random
from
the
jar,
what
is
the
probability
of
choosing
a
red
marble?
a
green
marble?
a
blue
marble?
a
yellow
marble?
2.
A
single
6-sided
die
is
rolled.
What
is
the
probability
of
each
outcome?
© Copyright NewPath Learning. All Rights Reserved.
Permission
is
granted
for
the
purchaser
to
print
copies
for
non-commercial
educational
purposes
only.
Visit
us
at
www.NewPathLearning.com.
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