Counting techniques

1
Counting techniques
In general to find out the number of outcomes in
a multistage event you multiply the number of
outcomes from the first event by the number of
outcomes in the second event and so on.
2 4 3 24
2
Example 2
Grant, Damien, Paul, Chris, Stuart, Romanta,
Karen, Barbara, Anne and Monica are standing for
the male and female school captains. a) How many
pairings of boy and girl captains are
possible? b) List the pairings.
a) 5 5 25
G D P C S
R
K
B
A
M
GR
DR
PR
CR
SR
GK DK PK CK SK
GB DB PB CB SB
GA DA PA CA SA
GM DM PM CM SM
3
Todays work
Exercise 7B Page 212 ? 213 Q1 ? 12