Material Master 9-6
The Two Coin Problem
Book 9, page 50
Coins Recording Sheet
Record your data for 20
pairs of tosses as tally
marks then the number in
brackets.
Two Heads
(
Number of Pairs of Tosses
)
(20)
Class Summary
Two
Heads
Number of Pairs
of Tosses
Two Heads
Running Total
Grand Running
Total
Two Heads
Percentage So Far
Pair 1
20
20
÷ 20 =
%
Pair 2
20
40
÷ 40 =
%
Pair 3
20
60
÷ 60 =
%
Pair 4
20
80
÷ 80 =
%
Pair 5
20
100
÷ 100 =
%
Pair 6
20
120
÷ 120 =
%
Pair 7
20
140
÷ 140 =
%
Pair 8
20
160
÷ 160 =
%
Pair 9
20
180
÷ 180 =
%
Pair 10
20
200
÷ 200 =
%
Pair 11
20
220
÷ 220 =
%
Pair 12
20
240
÷ 240 =
%
Pair 13
20
260
÷ 260 =
%
Pair 14
20
280
÷ 280 =
%
Pair 15
20
300
÷ 300 =
%
Pair 16
20
320
÷ 320 =
%
Pair 17
20
340
÷ 340 =
%
Copyright © Crown 2004
Numeracy Development Projects
Teachers may copy this page for educational purposes.
Material Master 9-6
The Two Coin Problem
Book 9, page 50
100 %
90 %
80 %
70 %
60 %
50 %
40 %
30 %
20 %
10 %
20
40
60
80
100
120
140
160
180
200
220
240
260
280
300
320
340
360
380
400
1 in 3 or 1 in 4?
Copyright © Crown 2004
Numeracy Development Projects
Teachers may copy this page for educational purposes.