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Example 3 - How many 2 digit even numbers can be formed - Fundamental principal of counting


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Example 3 How many 2 digit even numbers can be formed from the digits 1, 2, 3, 4, 5 if the digits can be repeated? Let the 2 digit even number be Only 2 numbers are possible at units place (2 and 4) as we need even number. But at tens place all 5 are possible Number of 2 digit even numbers = 2 5 = 10

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.