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Writing Probabilities

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by

Mr Mattock

on 4 January 2017

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Transcript of Writing Probabilities

Writing Probabilities
Starter
Writing Probabilities
How many boys in the room?


What is the probability of a student selected at random being a boy?
Example
In a particular football team of eleven there are 4 left-footed players.

What is the probability that a player selected at random is left-footed?
L.O. - To write probabilities using fractions.
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 ………….
Main Activity
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!
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
.
Complete the Writing Probability Sheet
Main Activity
Complete the Writing Probability Sheet
(b) (h)

(c) (i)

(d) (j)

(e) (k)

(f) (l)

(g)
2
8
3
8
3
8
1
8
3
8
3
8
6
8
1
8
2
8
1
8
5
8
(b)

(c)

(d)

(e)

(f)
2


3


4

1
8
2
8
1
8
0
8
3
8
There are three 3s
Example
In a particular football team of eleven there are 4 left-footed players.

What is the probability that a player selected at random is left-footed?
4
11
Activities
Activity
Answers

Key
Examples

Worked
Example
Full transcript