Writing Probabilities 36 Learning Goal Today we will learn about probability so that we can predict an outcome or several events using a probability line Well know weve got it when we can express probability using fractions ID: 496568
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Slide1
Predicting Outcomes Using Probability Lines &Writing Probabilities
3.6Slide2
Learning Goal
Today we will learn about probability so that we
can predict an outcome or several events using a
probability line. We’ll know we’ve got it when
we can express probability using fractions,
decimals or percentages.Slide3
Vocabulary
Certainty
Decimal
Decimal notation
Favourable results
FractionFractional notationImpossibility
Just as likely event
Likely event
More likely or less likely event
Percentage
Possibility
Possible outcomes
Probability lineSlide4
What is Probability?
It’s the possibility that an event will happen
Probability has a value of 0 to 1
0 = impossibility
1 = certaintySlide5
ProbabilitySlide6
Probability
It is a
certainty
that a card will be pulled
It is
just as likely to pull a black card as a red cardIt is
impossible
to pull a card with a value greater than 13
It is
just as likely
to pull a heart, diamond, spade or club
It is
less likely
to pull a face card than a number cardSlide7
Writing Probabilities
Probability can be expressed as ratios or fractions
Number of favourable outcomes
Number of possible results
# of favourable outcomes: # of unfavorable outcomesSlide8
Writing Probabilities
Probability can also be decimals and percentages
13
=
1 25% 52 = 4 0.25Slide9
Let’s Practice
Grade 5
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Grade 6
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