The fundamental counting principle can be very helpful when you need to figure out the possible number of outcomes of multiple events. The principle essentially works like this: If there are m possible ways for an event to occur, and n possible ways for another event to occur, there are m x n possible ways for both events to occur. In this lesson, we will apply the principle to real-life scenarios to see how it works.
How many pieces of clothing are you bringing all together?
If an outfit consists of a shirt and a pair of pants, how many different sets of outfit can you make?
Determine the answer by using:
(i) a tree diagram
(ii) the fundamental counting principle
How many odd four digit numbers are there?
An example of a four digit number is 3581, while 0492 is a three digit number.
Use only the digits 2, 4, 5, 6, 7, 8 and 9 to produce four digit numbers.
Fundamental counting principle
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