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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.

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Presentation on theme: "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."— Presentation transcript:

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 Example 1 A restaurant has the following menu. How many different combinations of 3 course meals can you have? Dessert Chocolate mousse Passion fruit pavlova Deep fried ice cream Main course Rump steak Spaghetti bolognaise Quiche Loraine Green chicken curry Entrée Soup of the day Caesar salad

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 GDPCS R K B A M GRDRPRCRSR GK DK PK CK SK GB DB PB CB SB GA DA PA CA SA GM DM PM CM SM

3 Today’s work Exercise 7B Page 212 → 213 Q1 → 12

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