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Introduction to Probability

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by

Mr Mattock

on 5 June 2018

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Transcript of Introduction to Probability

Introduction to Probability
Writing probabilities
Ideally as fractions

Decimals if used in the question

Words only if used in the question

Never as a ratio

Never as a mix of numbers and words.
L.O. - To understand what probability means, and how probabilities are represented.
Starter
Start on the left, work your way across doing the calculations in your head, and write down the answer.

START ANSWER

55 >> +9 , ÷8 , x7 , -14 , ÷3 , ÷2 , square , +11 , ÷4 ………….

14 >> +16 , x2 , +3 , ÷9 , -5 , square , square , +20 , ÷4 ………….

27 >> ÷9 , square , x6 , -40 , x2 , +8 , ÷6 , +19 , ÷5 ………….

10 >> square , ÷4 , ÷5 , +3 , square , -10 , ÷6 , +4 , x2 ………….

70 >> ÷2 , +5 , ÷5 , +4 , x5 , ÷10 , square , +12 , ÷8 ………….
Starter
Start on the left, work your way across doing the calculations in your head, and write down the answer.

START ANSWER

55 >> +9 , ÷8 , x7 , -14 , ÷3 , ÷2 , square , +11 , ÷4 …
15
.

14 >> +16 , x2 , +3 , ÷9 , -5 , square , square , +20 , ÷4 …
7
.

27 >> ÷9 , square , x6 , -40 , x2 , +8 , ÷6 , +19 , ÷5 …
5
.

10 >> square , ÷4 , ÷5 , +3 , square , -10 , ÷6 , +4 , x2 …
26
.

70 >> ÷2 , +5 , ÷5 , +4 , x5 , ÷10 , square , +12 , ÷8 …
6
.
3
5
0.6
Likely
3:5
3 out of 5
Using a scale
Using a scale
Ken
Colin
P(Ken getting
a sweet he likes)
=
3
5
P(Colin getting
a sweet he likes)
= =
1
5
5
P(Mandy getting
a sweet she likes)
= =
4
10
2
5
Mandy only likes red and green
Main Activity
Complete the RAG Sheet
Answers
Red
A
B
C
D
Amber
B
G
Y
Answers
Green
(a) (i) 3/8
(ii) 2/8 (or 1/4)
(iii) 5/8




(b) (i) 4/7
(ii) 3/7
(ii) 4/7
Bingo
Enter any of the fractions on the next screen
into your bingo grid. If they are the answer to
the probability question and you have them in
your grid then cross them off. Cross off all 9 and
BINGO!
Activities
Activity
Answers

Key
Examples

Worked
Example
Full transcript