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Example 1. A restaurant has the following menu. Entr ée Soup of the day Caesar salad. Main course Rump steak Spaghetti bolognaise Quiche Loraine Green chicken curry. Dessert Chocolate mousse Passion fruit pavlova Deep fried ice cream.
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Example 1 A restaurant has the following menu. Entrée Soup of the day Caesar salad Main course Rump steak Spaghetti bolognaise Quiche Loraine Green chicken curry Dessert Chocolate mousse Passion fruit pavlova Deep fried ice cream How many different combinations of 3 course meals can you have? 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
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 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
Today’s work Exercise 7B Page 212 → 213 Q1 → 12